adjust to {SHA1} convention for token

based on openstack-dev mailing list thread, support the {SHA1}
convention for headers that is generally agreed on.

Also fix a minor issue that Johannes found after the review landed,
which was doing substring matching instead of tuple matching.

Change-Id: I80a456c765026ac6179fd424ead01715798c1dac
Add posargs support to flake8 call

Add posargs to flake8 call in tox.ini, with this you can pass arguments
directly into flake8 using the following notation
  tox -epep8 -- --FLAKE8-ARG

This can be used to pass arguments like '--statistics' to flake8

Change-Id: Ia820d62c4a1f428d60d88b04d8a4d9b1442baa09
Bump hacking to 0.9.x series

In order to keep this patch to just a requirements bump, ignore new and
stricter hacking rules that are being triggered. Fixing up the code and
turning these on is out of scope of this patch and is for future
patches.

Change-Id: Ia3517e705f894b48585b957c21e7a3a6ed90e586
Merge "Add posargs support to flake8 call"
Merge "adjust to {SHA1} convention for token"
Merge "Bump hacking to 0.9.x series"