GS-11371
1. change pom version not by POMGenerator but with versions:set maven plugin (along with other pom files, gigaspaces/tools/quickbuild.xml, target: update_maven_version_for_build)
2. remove "pluginVersion" variable from pom.xml of maven-openspaces-plugin

git-svn-id: svn://pc-lab14/SVN/xap/trunk/openspaces@153834 eb64e737-3616-4df0-8941-5ee2ae88103d