Add a tripleo-cd for CD deploying an overcloud.

This isn't perfect, but it should be a decent enough starting point.

Change-Id: I67d397d37690d8e9d9596b22101baf9fe8be2762
Merge "Add a tripleo-cd for CD deploying an overcloud."
Make tripleo-cd install.d script executable

Change-Id: Ia11f1776c31bbf8def92d95a95738c8c07b0b4d5