Remove support for use-realm-roles in role mapping implementation,

Is has been agreed that where the realms used for authentication and the loading of groups contain groups with the same names as the role names that a 1:1 role mapping should still be defined rather than providing a general short cut: -

                <role name="Monitor">
                    <include>
                        <group name="Monitor"/>
                    </include>
                </role>

Only the configuration to enable the short cut is to be removed, the internal implementation will be left in place in-case demand is identified to re-add it.