fix tear_down from puppet_litmus

puppet_litmus gem is passing the target uri as the node_name param, which
causes an InventoryHelper.lookup exception.

Author: h0tw1r3

tasks/docker.rb

@@ -207,7 +207,7 @@ def provision(docker_platform, inventory, vars)
 begin
   result = provision(platform, inventory, vars) if action == 'provision'
   if action == 'tear_down'
-    node = inventory.lookup(name: node_name, group: 'ssh_nodes')
+    node = inventory.lookup(node_name, group: 'ssh_nodes')
     result = docker_tear_down(node['facts']['container_id'])
     inventory.remove(node).save
   end

tasks/docker_exp.rb

@@ -79,7 +79,7 @@ def provision(docker_platform, inventory, vars)
 begin
   result = provision(platform, inventory, vars) if action == 'provision'
   if action == 'tear_down'
-    node = inventory.lookup(name: node_name, group: 'docker_nodes')
+    node = inventory.lookup(node_name, group: 'docker_nodes')
     result = docker_tear_down(node['facts']['container_id'])
     inventory.remove(node).save
   end

tasks/provision_service.rb

@@ -138,7 +138,7 @@ def tear_down(node_name, inventory, _vars, retry_attempts)
     # remove all provisioned resources
     uri = URI.parse(ENV['SERVICE_URL'] || default_uri)
 
-    node = inventory.lookup(name: node_name)
+    node = inventory.lookup(node_name)
     facts = node['facts']
     job_id = facts['uuid']
     response = invoke_cloud_request(job_id, uri, '', 'delete', retry_attempts)

tasks/vagrant.rb

@@ -197,7 +197,7 @@ def provision(platform, inventory, enable_synced_folder, provider, cpus, memory,
 
 def tear_down(node_name, inventory)
   command = 'vagrant destroy -f'
-  node = inventory.lookup(name: node_name, group: 'ssh_nodes')
+  node = inventory.lookup(node_name, group: 'ssh_nodes')
   vagrant_env = node['facts']['vagrant_env']
   run_local_command(command, vagrant_env)
   FileUtils.rm_r(vagrant_env)