Fix kotlin maven plugin config

Author: rolandKulcsar

pom.xml

@@ -80,6 +80,7 @@
 		<slf4j.version>1.7.25</slf4j.version>
 		<spring.version>5.0.11.RELEASE</spring.version>
 		<spring-plugin.version>2.0.0.BUILD-SNAPSHOT</spring-plugin.version>
+		<kotlin.version>1.3.11</kotlin.version>
 	</properties>
 
 	<profiles>
@@ -426,19 +427,19 @@
 		<dependency>
 			<groupId>org.jetbrains.kotlin</groupId>
 			<artifactId>kotlin-stdlib</artifactId>
-			<version>1.2.71</version>
+			<version>${kotlin.version}</version>
 			<optional>true</optional>
 		</dependency>
 		<dependency>
 			<groupId>org.jetbrains.kotlin</groupId>
 			<artifactId>kotlin-reflect</artifactId>
-			<version>1.2.71</version>
+			<version>${kotlin.version}</version>
 			<optional>true</optional>
 		</dependency>
 		<dependency>
 			<groupId>org.jetbrains.kotlin</groupId>
 			<artifactId>kotlin-test</artifactId>
-			<version>1.2.71</version>
+			<version>${kotlin.version}</version>
 			<scope>test</scope>
 		</dependency>
 
@@ -686,14 +687,31 @@
 			<plugin>
 				<groupId>org.jetbrains.kotlin</groupId>
 				<artifactId>kotlin-maven-plugin</artifactId>
-				<version>1.2.71</version>
+				<version>${kotlin.version}</version>
 				<executions>
 					<execution>
 						<id>compile</id>
-						<phase>process-sources</phase>
 						<goals>
 							<goal>compile</goal>
 						</goals>
+						<configuration>
+							<sourceDirs>
+								<sourceDir>${project.basedir}/src/main/kotlin</sourceDir>
+								<sourceDir>${project.basedir}/src/main/java</sourceDir>
+							</sourceDirs>
+						</configuration>
+					</execution>
+					<execution>
+						<id>test-compile</id>
+						<goals>
+							<goal>test-compile</goal>
+						</goals>
+						<configuration>
+							<sourceDirs>
+								<sourceDir>${project.basedir}/src/test/kotlin</sourceDir>
+								<sourceDir>${project.basedir}/src/test/java</sourceDir>
+							</sourceDirs>
+						</configuration>
 					</execution>
 				</executions>
 			</plugin>