REPO-1800: Create group with an id that contains "/" does not return an error

- added validation

git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/BRANCHES/DEV/5.2.N/root@134748 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261

source/java/org/alfresco/rest/api/impl/GroupsImpl.java

@@ -701,6 +701,11 @@ public class GroupsImpl implements Groups
                 throw new InvalidArgumentException("groupId is null or empty");
             }
 
+            if (group.getId().indexOf('/') != -1)
+            {
+                throw new IllegalArgumentException("groupId contains characters that are not permitted.");
+            }
+
             if (groupAuthorityExists(group.getId()))
             {
                 throw new ConstraintViolatedException("Group '" + group.getId() + "' already exists.");