Migrate haproxy to svc-map

This patch migrates the haproxy element from map-services to
svc-map by adding a svc-map file and adding the -a option to
the call to os-svc-enable.

Change-Id: Ib01a14cfb61eafb0ba3e484ae2a7d441d242b330
Set lock_path in cinder.conf

Without this set, interprocess locking does not work properly.

We also need to ensure the cinder state directory is writable
by cinder, up to now it was not.
Change-Id: Idcabf808d5f7255d0cc382b7857a4c13b9b7a2dc
Closes-Bug: 1394963
Merge "Migrate haproxy to svc-map"