Add playbook to install mitogen (#3622)

ansible.cfg

@@ -3,6 +3,8 @@ pipelining=True
 ssh_args = -o ControlMaster=auto -o ControlPersist=30m -o ConnectionAttempts=100 -o UserKnownHostsFile=/dev/null
 #control_path = ~/.ssh/ansible-%%r@%%h:%%p
 [defaults]
+strategy_plugins = plugins/mitogen/ansible_mitogen/plugins/strategy
+
 host_key_checking=False
 gathering = smart
 fact_caching = jsonfile