[JENKINS-14653] Added a test to reproduce JENKINS-14653. TriggeredBuildSelector cannot handle maven modules as upstreams.
[FIXED JENKINS-14653] Accept both child and parent builds as triggering build. This is a generalization of handling MatrixProject.
Merge pull request #48 from ikedam/feature/JENKINS-14653_MavenWithTriggeredBuildSelector

[JENKINS-14653] maven with triggered build selector

Conflicts:
	src/main/java/hudson/plugins/copyartifact/TriggeredBuildSelector.java
	src/test/java/hudson/plugins/copyartifact/TriggeredBuildSelectorTest.java