Try to suppress some warnings in CI maven builds

headless-services/commons/pom.xml

@@ -13,6 +13,7 @@
 		<groupId>org.springframework.boot</groupId>
 		<artifactId>spring-boot-starter-parent</artifactId>
 		<version>2.0.5.RELEASE</version>
+		<relativePath></relativePath>
 	</parent>
 
 	<modules>
@@ -26,7 +27,6 @@
 		<module>commons-maven</module>
 		<module>commons-gradle</module>
 		<module>commons-boot-app-cli</module>
-		
 		<module>language-server-starter</module>
 	</modules>