Fixed a warning, run maven build in maven 3.2.1

[2395879]   WARN - en.execution.MavenResumeAction - Build was success, but not all project was build. Project build order: [sub-module2, my module, Using the builder org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder with a thread count of 1], build index: 2 
java.lang.Exception
	at org.jetbrains.idea.maven.execution.MavenResumeAction.log(MavenResumeAction.java:271)
	at org.jetbrains.idea.maven.execution.MavenResumeAction.access$300(MavenResumeAction.java:50)
	at org.jetbrains.idea.maven.execution.MavenResumeAction$1.processTerminated(MavenResumeAction.java:94)
allow to use system-independent delimiter in plugin.path property (comma)
Merge branch 'master' of https://github.com/ShlXue/intellij-community
revert util module language level changes