[UIMA-659] adjust update site url to where it will likely be.  Also, add the mirror information.
[UIMA-659] adjust update site url to where it will likely be.  Also, add the mirror information.

git-svn-id: 67f5ad311a3d1220c16f120748b212c18fe1c257@599890 13f79535-47bb-0310-9956-ffa450edef68

apache/uima-uimaj,apache/uima-uimaj,apache/uima-uimaj,apache/uima-uimaj,apache/uima-uimaj