Remove old versions of pre-release plugins following renaming to the                          convention defined in the "Plugin Infrastructure" doc.
Remove old versions of pre-release plugins following renaming to the                         
convention defined in the "Plugin Infrastructure" doc.


git-svn-id: 36dcc065b18e9ace584b1c777eaeefb1d96b1ee8@160525 13f79535-47bb-0310-9956-ffa450edef68

apache/forrest,apache/forrest,apache/forrest,apache/forrest,apache/forrest,apache/forrest