Add support for Debain 7.

Add beaker tests for Puppet opensource: Centos 6, Ubuntu 12.04, Debian 7
Add beaker tests for Puppet Enterprise: Centos 6
set correct path to puppet config dir
final cleanup before commit
Merge branch 'master' into f3792625/beaker_tests

Conflicts:
	spec/classes/stash_config_spec.rb
Merge branch 'f3792625/beaker_tests'