litmus:tear_down fails for inventories with nodes that don't have a provisioner fact.

[RandomNoun7]

If the litmus:tear_down rake task is called using an inventory that has nodes do not have a provisioner fact (for instance if the node was not provisioned by Litmus), this task will fail when it encounters that node.

The tear_down_nodes function should filter out any nodes in the inventory that do not have a provisioner fact.

puppet_litmus/lib/puppet_litmus/rake_helper.rb

Line 171 in 7001c24

targets.each do |node_name|