use latest maven-forge-plugin

git-svn-id: http://svn.terracotta.org/svn/ehcache@8790 b9324663-ca0f-0410-8574-be9b3887307d
merge 8790 from trunk/ehcache-os 

git-svn-id: http://svn.terracotta.org/svn/ehcache@8791 b9324663-ca0f-0410-8574-be9b3887307d
merge 8790 from trunk/ehcache-os 

git-svn-id: http://svn.terracotta.org/svn/ehcache@8792 b9324663-ca0f-0410-8574-be9b3887307d
make default transaction manager lookup always just use Class.forName()

git-svn-id: http://svn.terracotta.org/svn/ehcache@8793 b9324663-ca0f-0410-8574-be9b3887307d