Foreman » Installer

Deal with systems without AIO packages

• Do not only rely on version to see if we use AIO package,
  instead use the rubylibdir fact.
• Fix directory ownership without puppet user
• Add package 'source' parameter to be used (mainly) with Windows
• Adjust tests

This commit does not allow you to switch to from Puppet 3 to Puppet-AIO
package.

Closes GH-290