fix alarm_package_name for Debian/Ubuntu (only havana)

  - Debian uses separate packages in havana
  - Ubuntu uses ceilometer-common which conflicts with init.pp
  - separate tests for Ubuntu/Debian (for alarm*)
  - Change-Id: I91098bd3f13ee4391dcf1b870705c0a0c5566acc
    introduced this troubles.

Change-Id: I8d396131386e5469eb6d7d43d7c6a7354abed31a
Move service polling credentials to service_credentials

Change-Id: I74a523bcc1acd18532bb9353b70da63c70e8e325
Closes-bug: #1287939
(cherry picked from commit 160b5ed239e996e6c18de3f6158c8b0a4e66c175)
Merge "fix alarm_package_name for Debian/Ubuntu (only havana)" into stable/havana