Application should start when there is no site parsers available

[php-coder]

2018-07-17 09:26:59.936  WARN 24895 --- [           main] ationConfigEmbeddedWebApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'getDownloadingSucceededEventListener' defined in ru.mystamps.web.config.EventsConfig: Unsatisfied dependency expressed through method 'getDownloadingSucceededEventListener' parameter 0; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'java.util.List<ru.mystamps.web.util.extractor.SiteParser>' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {}
2018-07-17 09:27:00.054  INFO 24895 --- [           main] o.e.jetty.server.handler.ContextHandler  : Stopped o.s.b.c.e.j.JettyEmbeddedWebAppContext@11392934{/,[jar:file:/data/mystamps/mystamps.war!/],UNAVAILABLE}
2018-07-17 09:27:00.111  INFO 24895 --- [           main] utoConfigurationReportLoggingInitializer :
Error starting ApplicationContext. To display the auto-configuration report re-run your application with 'debug' enabled.
2018-07-17 09:27:00.675 ERROR 24895 --- [           main] o.s.boot.SpringApplication               : Application startup failed
org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'getDownloadingSucceededEventListener' defined in ru.mystamps.web.config.EventsConfig: Unsatisfied dependency expressed through method 'getDownloadingSucceededEventListener' parameter 0; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'java.util.List<ru.mystamps.web.util.extractor.SiteParser>' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {}
        at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:749) ~[spring-beans-4.3.18.RELEASE.jar!/:4.3.18.RELEASE]
        at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:467) ~[spring-beans-4.3.18.RELEASE.jar!/:4.3.18.RELEASE]
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1181) ~[spring-beans-4.3.18.RELEASE.jar!/:4.3.18.RELEASE]
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1075) ~[spring-beans-4.3.18.RELEASE.jar!/:4.3.18.RELEASE]
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:513) ~[spring-beans-4.3.18.RELEASE.jar!/:4.3.18.RELEASE]
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:483) ~[spring-beans-4.3.18.RELEASE.jar!/:4.3.18.RELEASE]
        at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:312) ~[spring-beans-4.3.18.RELEASE.jar!/:4.3.18.RELEASE]
        at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) ~[spring-beans-4.3.18.RELEASE.jar!/:4.3.18.RELEASE]
        at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:308) ~[spring-beans-4.3.18.RELEASE.jar!/:4.3.18.RELEASE]
        at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197) ~[spring-beans-4.3.18.RELEASE.jar!/:4.3.18.RELEASE]
        at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:761) ~[spring-beans-4.3.18.RELEASE.jar!/:4.3.18.RELEASE]
        at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:867) ~[spring-context-4.3.18.RELEASE.jar!/:4.3.18.RELEASE]
        at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:543) ~[spring-context-4.3.18.RELEASE.jar!/:4.3.18.RELEASE]
        at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:122) ~[spring-boot-1.5.14.RELEASE.jar!/:1.5.14.RELEASE]
        at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:693) [spring-boot-1.5.14.RELEASE.jar!/:1.5.14.RELEASE]
        at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:360) [spring-boot-1.5.14.RELEASE.jar!/:1.5.14.RELEASE]
        at org.springframework.boot.SpringApplication.run(SpringApplication.java:303) [spring-boot-1.5.14.RELEASE.jar!/:1.5.14.RELEASE]
        at org.springframework.boot.SpringApplication.run(SpringApplication.java:1118) [spring-boot-1.5.14.RELEASE.jar!/:1.5.14.RELEASE]
        at org.springframework.boot.SpringApplication.run(SpringApplication.java:1107) [spring-boot-1.5.14.RELEASE.jar!/:1.5.14.RELEASE]
        at ru.mystamps.web.support.spring.boot.ApplicationBootstrap.main(ApplicationBootstrap.java:49) [classes!/:0.3-SNAPSHOT]
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_151]
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_151]
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_151]
        at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_151]
        at org.springframework.boot.loader.MainMethodRunner.run(MainMethodRunner.java:48) [mystamps.war:0.3-SNAPSHOT]
        at org.springframework.boot.loader.Launcher.launch(Launcher.java:87) [mystamps.war:0.3-SNAPSHOT]
        at org.springframework.boot.loader.Launcher.launch(Launcher.java:50) [mystamps.war:0.3-SNAPSHOT]
        at org.springframework.boot.loader.WarLauncher.main(WarLauncher.java:59) [mystamps.war:0.3-SNAPSHOT]
Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'java.util.List<ru.mystamps.web.util.extractor.SiteParser>' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {}
        at org.springframework.beans.factory.support.DefaultListableBeanFactory.raiseNoMatchingBeanFound(DefaultListableBeanFactory.java:1493) ~[spring-beans-4.3.18.RELEASE.jar!/:4.3.18.RELEASE]
        at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1104) ~[spring-beans-4.3.18.RELEASE.jar!/:4.3.18.RELEASE]
        at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1066) ~[spring-beans-4.3.18.RELEASE.jar!/:4.3.18.RELEASE]
        at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:835) ~[spring-beans-4.3.18.RELEASE.jar!/:4.3.18.RELEASE]
        at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:741) ~[spring-beans-4.3.18.RELEASE.jar!/:4.3.18.RELEASE]
        ... 27 common frames omitted

[php-coder]

Looks like I didn't test such configuration when I was testing 29f6dc9 commit (#660).