Switch to use implementation config

- Now switching to use implementation configuration as it
  works better with aot tooling.
- Relates #470

Author: jvalkeal

buildSrc/src/main/java/org/springframework/shell/gradle/ManagementConfigurationPlugin.java

@@ -46,10 +46,7 @@ public void apply(Project project) {
 			management.setCanBeResolved(false);
 			PluginContainer plugins = project.getPlugins();
 			plugins.withType(JavaPlugin.class, (javaPlugin) -> {
-				configurations.getByName(JavaPlugin.COMPILE_CLASSPATH_CONFIGURATION_NAME).extendsFrom(management);
-				configurations.getByName(JavaPlugin.RUNTIME_CLASSPATH_CONFIGURATION_NAME).extendsFrom(management);
-				configurations.getByName(JavaPlugin.TEST_COMPILE_CLASSPATH_CONFIGURATION_NAME).extendsFrom(management);
-				configurations.getByName(JavaPlugin.TEST_RUNTIME_CLASSPATH_CONFIGURATION_NAME).extendsFrom(management);
+				configurations.getByName(JavaPlugin.IMPLEMENTATION_CONFIGURATION_NAME).extendsFrom(management);
 			});
 			plugins.withType(JavaTestFixturesPlugin.class, (javaTestFixturesPlugin) -> {
 				configurations.getByName("testFixturesCompileClasspath").extendsFrom(management);

spring-shell-samples/spring-shell-samples.gradle

@@ -21,10 +21,3 @@ graalvmNative {
 		version = "0.1.1"
 	}
 }
-
-// TODO: workaround until boot's aot plugin automatically extends
-//       from all super configurations like graalvm's plugin does.
-configurations {
-	aotCompileClasspath.extendsFrom management
-	aotRuntimeClasspath.extendsFrom management
-}