Currently the ceph-osd post-apply job always restarts OSDs without
disruption. This requires waiting for a healthy cluster state in
betweeen failure domain restarts, which isn't possible in some
upgrade scenarios. In those scenarios where disruption is
acceptable and a simultaneous restart of all OSDs is required,
the disruptive_osd_restart value now provides this option.
Change-Id: I64bfc30382e86c22b0f577d85fceef0d5c106d94