Always return qualified variable '::acpid_version'
Always return qualified variable '::acpid_version'

This change will fix the facter acpid_version to return an
empty value if acpid not installed yet.

Change-Id: Ia85d73abf8591058c3dcf351d693f816b4d557eb
Closes-Bug: #1574674
Signed-off-by: Maksim Malchuk <cd52e5d5fd49a1b4140294fb36cf3d76034c014f@mirantis.com>

stackforge/fuel-library,stackforge/fuel-library,stackforge/fuel-library,stackforge/fuel-library