Alarm: record history support

Ceilometer Alarm is able to record alarm change events.
This patch add this support in manifest.

Change-Id: Id8ece03dfd3491cd2886a345771df9622d702190
Signed-off-by: Emilien Macchi <emilien.macchi@enovance.com>
changed rabbit_virtualhost(wrong) to rabbit_virtual_host

the puppet module configures a rabbit_virtualhost, there is a missing underscore (rabbit_virtual_host). changed this for manifest and tests.

Change-Id: I02b34eb6531cfa0071a7e52f5a97f0e952f8ea85
Merge "Alarm: record history support"
Merge "changed rabbit_virtualhost(wrong) to rabbit_virtual_host"