Merged 2.2 to HEAD

8729: Fix for AWC-1957 & AWC-1962 (Administrator is unable to add any user to "Selected users/groups and their role(s)" list)

git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@8777 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261

source/java/org/alfresco/web/bean/users/UserMembersBean.java

@@ -567,6 +567,7 @@ public abstract class UserMembersBean extends BaseDialogBean implements IContext
                }
             }
             // action context setup
+            this.personRolesDataModel = null;
             this.personRoles = userPermissions;
             setPersonAuthority(authority);
          }