This patch adds two new features:
* Output is now in RST format
* Ansible roles in OSA are diffed as well
The RST output makes it easier to copy/paste the output into release
notes, documentation, or other RST-formatted items.
The script also diffs the Ansible roles that are installed along with
OpenStack-Ansible. These were helper roles in Liberty and earlier,
but they include the IRR roles in Mitaka and beyond.
Example output: https://gist.github.com/major/b371aba29720748ab6e1e55a2bf164ab
Change-Id: I863a29fad5e56e02a9f47b015ac71867b16e4060
6e452cfb19