revert changes related to STANBOL-1254 (exporting 'javax.transaction.xa' in the framework fragment) until further discussions and resolving the issue shown in 5th commit of that issue.

git-svn-id: https://svn.apache.org/repos/asf/stanbol/branches/release-0.12@1559065 13f79535-47bb-0310-9956-ffa450edef68