[MNG-4074] Fixing cyclic reference problem with a parent pom declaring one of its modules as a plugin-level dependency in a plugin it uses. Also, fixing a problem where the version-expression transformation chokes on invalid POMs from the repository during invoker:install.
Merged from: r751826 | jdcasey


git-svn-id: https://svn.apache.org/repos/asf/maven/components/branches/maven-2.1.x@755230 13f79535-47bb-0310-9956-ffa450edef68
5 files changed