Bump rspec-puppet to 2.1.0
Bump rspec-puppet to 2.1.0

rspec-puppet 2.1.0 includes Puppet 4.0 support [1].

[1] https://github.com/rodjek/rspec-puppet/commits/v2.1.0

Change-Id: I5b61787ea3a660192dd0f41c65cf7f4bb74cf521

plumgrid/puppet-vswitch,redhat-cip/puppet-vswitch,squarit/puppet-vswitch,rdo-puppet-modules/puppet-vswitch,openstack/puppet-vswitch,openstack/puppet-vswitch