bug #2542: cdrom on ceph datastore uses CEPH_HOST, CEPH_SECRET, CEPH_USER. Patch contributed by Vladislav Gorbunov.

(cherry picked from commit 60c763c38ba80c86efe69fcb0e71a2fe6fe2100c)
bug #2544: Use REPLACE to insert monitoring values

(cherry picked from commit dc79dd2c38b4a55f571891c1b6cd46c638a5df55)
Merge remote-tracking branch 'upstream/one-4.4' into one-4.4