Apache Forrest code update (bug FOR-1031)

code update
by
TWW
(fixes bug FOR-1031)

:

Replaced the custom caching implementation with EHCache in the
LocationMap feature. Given how integral the LM has become, this gives
us much better overall performance, concurrent behavior, and cache
configuration options.
Added a default cache config file to main/webapp/WEB-INF/ehcache.xml