Update rolling_update.yml

Update rolling_update.yml

The task waiting for the monitor to join the quorum... , the result for ceph -s | grep monmap only contain monmap, not included quorum:

# ceph -s --cluster ceph | grep monmap
     monmap e1: 3 mons at {sh-office-ceph-1=10.12.10.34:6789/0,sh-office-ceph-2=10.12.10.35:6789/0,sh-office-ceph-3=10.12.10.36:6789/0}

If want to get monitor, should use this:

# ceph -s --cluster ceph | grep election
            election epoch 80, quorum 0,1 sh-office-ceph-1,sh-office-ceph-2

ceph verison: 10.2.5