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
Merge "fix alarm_package_name for Debian/Ubuntu (only havana)" into stable/havana