move arbitrary wait into playbook

[SolomonShorser-OICR]

Ansible has a wait_for module and it might be cleaner than the existing "arbitrary wait" in the .youxia/config file:

http://docs.ansible.com/ansible/wait_for_module.html

[denis-yuen]

As discussed, a feature like this would be very helpful.
I'm not sure whether wait_for precisely would work, we need to experiment and see whether wait_for can wait before that initial Ansible connection over SSH to gather facts or whether ansible is set for fact gathering before everything in a playbook including wait_for.

But something "like" this would be great.