Description of problem:
overcloud deplpyment fails with : conditional check 'ceph_health' failed

detailed message: 
        "included: /usr/share/ceph-ansible/roles/ceph-mon/tasks/ceph_keys.yml for controller-0, controller-1, controller-2",
        "TASK [ceph-mon : waiting for the monitor(s) to form the quorum...] *************",
        "task path: /usr/share/ceph-ansible/roles/ceph-mon/tasks/ceph_keys.yml:2",
        "Wednesday 29 May 2019  10:43:41 +0000 (0:00:00.407)       0:02:29.558 ********* ",
        "fatal: [controller-0]: FAILED! => ",
        "  msg: |-",
        "    The conditional check '(ceph_health_raw.stdout != \"\") and (ceph_health_raw.stdout | default('{}') | from_json)['state'] in ['leader', 'peon']",
        "    ' failed. The error was: Expecting value: line 1 column 1 (char 0)",


Version-Release number of selected component (if applicable):
osp15

How reproducible:
100%

Steps to Reproduce:
rerun : 
https://rhos-qe-jenkins.rhev-ci-vms.eng.rdu2.redhat.com/view/DFG/view/pidone/view/sanity/job/DFG-pidone-sanity-15_director-rhel-virthost-3cont_2comp_3ceph-ipv4-geneve-sanity/

Additional info:
sos reports / ovrercloud node logs and stack home are at : 
https://rhos-qe-jenkins.rhev-ci-vms.eng.rdu2.redhat.com/view/DFG/view/pidone/view/sanity/job/DFG-pidone-sanity-15_director-rhel-virthost-3cont_2comp_3ceph-ipv4-geneve-sanity/9/artifact/