Description of problem:

ManagementPermissionAuthorizer.authorizeJmxOperation uses hard coded decision making based on the standard 7 roles. This is inflexible and specifically doesn't allow scoped roles to function properly.

Steps to Reproduce:
1.  Create a server-group-scoped-role and assign a user ("testuser") to that role:

    <management>
        <access-control provider="rbac">
            <server-group-scoped-roles>
                <role name="test_main_server_grp" base-role="SuperUser">
                    <server-group name="main-server-group"/>
                </role>
            </server-group-scoped-roles>
            <role-mapping>
                <role name="SuperUser">
                    <include>
                        <user name="$local"/>
                        <user alias="jconsole" realm="ApplicationRealm" name="jconsole"/>
                    </include>
                </role>
                <role name="test_main_server_grp">
                    <include>
                        <user alias="testuser" realm="ApplicationRealm" name="testuser"/>
                    </include>
                </role>
            </role-mapping>
        </access-control>
    </management>

2.  Deploy an mbean

3.  Use bin/jconsole.sh to connect as the "testuser" 

4.  Try to modify the mbean.  "testuser" should have access to modify the mbean.