Fix package ceilometer-alarm type error on Debian

This commit:
  - Fix type error about ceilometer-alarm package name
    - See bug #1263946
  - Fix indentation on Debian params.pp
  - Fix spec warnings (partition_rpc_topic,record_history)

Closes-bug: #1263946

Change-Id: I1ad19af429f2787d58837e51da95e981bdd66b40
Only add ceilometer user to nova group if using compute agent

When using ceilometer outside of the compute context (ex: with the
swift middleware), puppet-ceilometer attempts to add the user to
the nova group which does not (and probably should not) exist on
the swift nodes.

Change-Id: I6cc68152325a967c024ce611f92a90ce0afba8cc
Merge "Only add ceilometer user to nova group if using compute agent"
Merge "Fix package ceilometer-alarm type error on Debian"