Add facter package to uninstall-puppet macro

Although rspec tests for Puppet modules are running in bundler,
the system version of facter looks to conflict with rspec tests:

    ArgumentError:
      Invalid facter option(s) type

This hypothesis has been confirmed on a system with a similar setup.
Uninstalling the system version of facter fixed the above problem.

Change-Id: I24fc6607f27f013d63903f6e709a5ce266495287
Merge "Add facter package to uninstall-puppet macro"