indent using 4 spaces (3/3)

As advised in I072cf8bf6748d0c910fecffdf2282bcc4656d038, code should
use 4 spaces for indentation.
This commit enforces the use of 4 spaces indentation.
In order to simplify the review process, this patch only cover the
following elements:
 - os-apply-config
 - os-collect-config
 - os-refresh-config
 - os-svc-install
 - pacemaker
 - pypi-mirror
 - qpidd
 - rabbitmq-server
 - snmpd
 - stackuser
 - tripleo-cd

Change-Id: I3f365f6a1cd6fd9e56402ad3bd6572192b85d798
Merge "indent using 4 spaces (3/3)"