STANBOL-1238: This reverts all changes committed related to this issue. Adds open() call to the ChainRootResource and EnhancementEnginesRootResource that are necessary after this revert.

git-svn-id: https://svn.apache.org/repos/asf/stanbol/trunk@1551552 13f79535-47bb-0310-9956-ffa450edef68