I moved the cache manager to ServletContext
https://github.com/mlinhard/infinispan/commit/47f36c09dd632eaff10ef96ac401e39eefc57135
this requires change in JDG server:
https://github.com/mlinhard/jdg/commit/a60d2735653021ca46eaba089b4e9c2f6c96a015

testsuite passes, is parallel again
tested with latest JDG branch

I guess this needs broader review, at least @tristantarrant for the JDG server part.
if you think this is ok, I'll have to test it for JBoss AS 5.x, 6.x compatibility and some further tests,
also I just noticed I reformatted the imports in Server.scala, which I want to revert, plz ignore that