ceph-handler: set handler on xxx_stat result

ceph-handler: set handler on xxx_stat result

In non containerized deployment we check if the service is running
via the socket file presence.
This is done via the xxx_socket_stat variable that check the file
socket in the /var/run/ceph/ directory.
In some scenarios, we could have the socket file still present in
that directory but not used by any process.
That's why we have the xxx_stat variable which clean those leftovers.

The problem here is that we're set the variable for the handlers status
(like handler_mon_status) based on xxx_socket_stat instead of xxx_stat.
That means we will trigger the handlers if there's an old socket file
present on the system without any process associated.

Closes: https://bugzilla.redhat.com/show_bug.cgi?id=1866834
Signed-off-by: Dimitri Savineau <dsavinea@redhat.com>