Removes and/or replaces all mentions of py27.

Cleans up obsolete requirements and their lower-constraints.

Separates test-requirements.

Makes lower-constraints pass outside of CI (MarkupSafe).

Adds FIXMEs about some hacky Mocks that may misbehave.

Change-Id: Ifc090bf3c1db17d8542ee591c91e8225a597bfe2

Change-Id: If66146987a6316917e54e99fcefa6ec3f3884d2f

Change-Id: I4d06f36d03c9e74265c628686fabed601fe14c20

This commit adds a few #nosec tags for non-issues.  I've examined
the code and determined that these don't represent security issues
so we should add a #nosec tag that tells Bandit not to find these
issues in the future.

Closes-Bug: #1577498
Change-Id: Ic37216c08442c700c64118c78cfb46e6cedd237c

Change-Id: Ibe06fcece3a098781f8b55437727617b2727509f

Install Ansible code, etc file examples, scripts, an open
rc example, a tool to initialize the OpenStack deployment,
and other various useful bits.

Start the versioning at 0.1.0 as recommended by ttx.

Change-Id: I35fa4042040957e7725c7fc3b146009e0135499a
Partially-Implements: blueprint python-package