85515: Merged DEV to HEAD-BUG-FIX (5.0/Cloud).
63635: ALF-20865 Consumers should not be able to share/unshare a document
Unshare action can perform consumer/contributer who performed Share action or a user with another role.
84859: ACE-936 Consumers should not be able to share/unshare a document
In QuickShareRestApiTest was added testUnshareContributer() test.
git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@85533 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261