Replace socket-based liveness checks with scripts
The current TCP socket-based liveness/readiness check for Ceph
doesn't accurately reflect when daemons are live, doesn't handle
multiple OSDs on a host, and doesn't work when hostNetworking is
in use and the Ceph network is different from the one associated
with the hostname. This change adds new scripts for checking
Ceph monitor and OSD liveness/readiness that query the Ceph Unix
domain sockets to get daemon status and exits 0 iff all sockets
report that their daemons are in an "active" state.
This isn't perfect: we don't know how many daemons SHOULD be
active, so if only a subset is live and the others have no
sockets (yet?), we'll still claim the pod is ready. The scripts
also don't distinguish between liveness and readiness for OSDs.
Change-Id: I5d370b4bc4025fece2e640355c3a29167afca871
5f3f13cc0a