Pulp

FIPS: Setting the usedforsecurity flag to False if available

In some builds of Python, a usedforsecurity flag is available to declare that md5 is not being used for security purposes. Set this flag if it's available. This is required for FIPS environments.

Fix docs/make.bat pip&git induced coflict

The installation required a custom commit from sphinx_rtd_theme git+https://github.com/snide/sphinx_rtd_theme.git@abfa98539a2bfc44198a9ca8c2f16efe84cc4d26

The pip however started to get issues pulling that in:

$ pip install flake8 sphinx sphinxcontrib-swaggerdoc celery sphinxcontrib-swaggerdoc 'django<2' git+https://github.com/snide/sphinx_rtd_theme.git@abfa98539a2bfc44198a9ca8c2f16efe84cc4d26 pyyaml
Collecting git+https://github.com/snide/sphinx_rtd_theme.git@abfa98539a2bfc44198a9ca8c2f16efe84cc4d26
  Cloning https://github.com/snide/sphinx_rtd_theme.git (to abfa98539a2bfc44198a9ca8c2f16efe84cc4d26) to /tmp/pip-drCLVI-build
  Could not find a tag or branch 'abfa98539a2bfc44198a9ca8c2f16efe84cc4d26', assuming commit.
error: Your local changes to the following files would be overwritten by checkout:
	docs/make.bat
Please commit your changes or stash them before you switch branches.
Aborting
Command "git checkout -q abfa98539a2bfc44198a9ca8c2f16efe84cc4d26" failed with error code 1 in /tmp/pip-drCLVI-build

This patch replaces custom commit with straight package install that seems to workaround the issue (at least for now).