fix for STANBOL-1258 for the 0.12 branch. This also greatly imrpoves DEBUG level logging for the EntityCache. The FST Linking engine will now show INFO level logging with the size of the EntityCache during activation

git-svn-id: https://svn.apache.org/repos/asf/stanbol/branches/release-0.12@1558711 13f79535-47bb-0310-9956-ffa450edef68