Jira UIMA-525: move 2.1 SVN tags under common directory.

https://issues.apache.org/jira/browse/UIMA-525


git-svn-id: https://svn.apache.org/repos/asf/incubator/uima/uimaj/tags/uimaj-2.1.0@564105 13f79535-47bb-0310-9956-ffa450edef68
142 files changed