Test on 2.1 also. Drop multiple JDK test.
Test on 2.1 also. Drop multiple JDK test.

wyattisimo/mongoid_paranoia,dblock/mongoid_paranoia,deepredsky/mongoid_paranoia,SolarCS/mongoid_paranoia,simi/mongoid_paranoia,Aethelflaed/mongoid-paranoia,bezugen/mongoid_paranoia