RoleController: removed duplication of parent role in list of roles to delete

git-svn-id: https://svn.apache.org/repos/asf/syncope/branches/1_1_X@1597713 13f79535-47bb-0310-9956-ffa450edef68
merge from branch 1_1_X

git-svn-id: https://svn.apache.org/repos/asf/syncope/trunk@1597715 13f79535-47bb-0310-9956-ffa450edef68