Added java version details to readme.
Added java version details to readme.

tadayosi/switchyard,cunningt/switchyard,igarashitm/switchyard,igarashitm/switchyard,jboss-switchyard/switchyard,igarashitm/switchyard,bfitzpat/switchyard,cunningt/switchyard,jboss-switchyard/switchyard,bfitzpat/switchyard,tadayosi/switchyard,tadayosi/switchyard,cunningt/switchyard,jboss-switchyard/switchyard,igarashitm/switchyard,bfitzpat/switchyard