Refactor custom wait loops to ansible 2.8+ k8s module wait_* parameters

[jmaupetit]

Purpose

We want Arnold deployments to be synchronous for crucial steps. Hence, we've implemented wait loops that ensure that our deployment respects particular conditions (the number of pods with a particular status, etc.).

Ansible 2.8 k8s module introduced new parameters that does exactly what we tried to achieve [1]. Switching to this new standard will drastically simplify our code.

Proposal

• use k8s module wait_* parameters

References

[1] https://github.com/ansible/ansible/blob/stable-2.9/changelogs/CHANGELOG-v2.9.rst#id3