93248: Merged 5.0.N (5.0.1) to HEAD-BUG-FIX (5.1/Cloud)
93130: Merged V4.2-BUG-FIX (4.2.5) to 5.0.N (5.0.1)
93124: Merged DEV to V4.2-BUG-FIX (4.2.5)
92705 : MNT-12991 : Disabled users can be invited in site
- Added check for disabled user
- Added unit test
git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@94946 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261