Applied patch from jira issue - OFBIZ-4362 - MapKey for CMS content cannot be updated.
Thanks Manuela for reporting the bug, Thanks Deepak for providing the patch for this issue. 

git-svn-id: https://svn.apache.org/repos/asf/ofbiz/trunk@1639867 13f79535-47bb-0310-9956-ffa450edef68