Description of problem:
when running playbook to push new ceph.conf:
ansible-playbook site.yml --tags='ceph_update_config'
playbook fails on  "The conditional check 'osd_socket_stat.rc == 0' failed" or for mon_socket_stat too:
 - first the playbook failed on [ceph-handler : restart ceph mon daemon(s) - non container] 
 - re-run of the playbook skipped this, as the ceph.conf matched already for the mon, as generate conf in previous run did the ceph.conf change
 - but failed on OSD [ceph-handler : restart ceph osds daemon(s) - non container] 
 - next re-run would again skip this as the ceph.conf would match, as generate conf in previous run did the ceph.conf change

first run
-------
RUNNING HANDLER [ceph-handler : restart ceph mon daemon(s) - non container] ****************************************************************************************************************
Friday 20 September 2019  11:42:39 +0200 (0:00:01.517)       0:04:37.255 ****** 
fatal: [mon-node-0]: FAILED! => {
    "msg": "The conditional check 'mon_socket_stat.rc == 0' failed. The error was: error while evaluating conditional (mon_socket_stat.rc == 0): 'mon_socket_stat' is undefined\n\nThe error appears to have been in '/usr/share/ceph-ansible/
roles/ceph-handler/handlers/main.yml': line 27, column 3, but may\nbe elsewhere in the file depending on the exact syntax problem.\n\nThe offending line appears to be:\n\n\n- name: restart ceph mon daemon(s) - non container\n  ^ here\n"
-------

second run
-------
RUNNING HANDLER [ceph-handler : restart ceph osds daemon(s) - non container] ****************************************************************************************************************
Friday 20 September 2019  11:42:39 +0200 (0:00:01.517)       0:04:37.255 ****** 
fatal: [osd-node-0]: FAILED! => {
    "msg": "The conditional check 'osd_socket_stat.rc == 0' failed. The error was: error while evaluating conditional (osd_socket_stat.rc == 0): 'osd_socket_stat' is undefined\n\nThe error appears to have been in '/usr/share/ceph-ansible/
roles/ceph-handler/handlers/main.yml': line 82, column 3, but may\nbe elsewhere in the file depending on the exact syntax problem.\n\nThe offending line appears to be:\n\n\n- name: restart ceph osds daemon(s) - non container\n  ^ here\n"
-------

Version-Release number of selected component (if applicable):
ceph-mon-12.2.8-89.el7cp
ansible-2.6.14-1.el7ae.noarch
ceph-ansible-3.2.8-1.el7cp.noarch

reproduced also on latest
ceph-ansible-3.2.24-1.el7cp.noarch
ansible-2.6.19-1.el7ae.noarch
ceph-mon-12.2.12-45.el7cp

How reproducible:
always

Steps to Reproduce:
1. push new ceph.conf change with ansible-playbook site.yml --tags='ceph_update_config'
2. observe playbok fail
3.

Actual results:
playbook fails

Expected results:
playbook succeeds

Additional info: