Allow stop and convert from leaf to parent queue in a single Mutation API call

Capacity-Scheduler.xml: 

yarn.scheduler.capacity.root.queues = default
yarn.scheduler.capacity.root.default.capacity = 100 

cat abc.xml 

<sched-conf>
      <add-queue>
          <queue-name>root.default.v1</queue-name>
          <params>
            <entry>
              <key>capacity</key>
              <value>100</value>
            </entry>
          </params>
        </add-queue>
        <update-queue>
          <queue-name>root.default</queue-name>
          <params>
            <entry>
              <key>state</key>
              <value>STOPPED</value>
            </entry>
          </params>
        </update-queue>
      </sched-conf>  

[yarn@pjoseph-1 tmp]$ curl --negotiate -u : -X PUT -d @add.xml -H "Content-type: application/xml" 'http://<RM_HOST>:8088/ws/v1/cluster/scheduler-conf?user.name=yarn'
Failed to re-init queues : Can not convert the leaf queue: root.default to parent queue since it is not yet in stopped state. Current State : RUNNING