Require django-pyscss 1.0.1 for django-compressor 1.4 support

Since django-compressor 1.4 changed the parameters for its filter
class, we need a newer version of django-pyscss that takes that
change into consideration.

This is needed for patch https://review.openstack.org/#/c/90371/

Change-Id: Ie2389fa60ee5c60689e55f193ebbbd57b1c9959d
Partial-implements: blueprint bootstrap-update
Bump up to the six 1.7.x series

The six 1.7.x series brings in some nice adjustments
that users of six can take advantage of, including
but not limited to (the below were selected from
the six changelog and are widely used six features
across openstack):

- Select the implementations of dictionary iterator
  routines at import time for a 20% speed boost.
- Improve add_metaclass, so that it doesn't end up
  inserting another class into the hierarchy.

The full changelog can be found at:

https://bitbucket.org/gutworth/six/src/35f6/CHANGES?at=1.7.0

Change-Id: I80b09c5921ad277e1ec1da47ae718db8b43a8c23
Merge "Bump up to the six 1.7.x series"
Update skip pep8 clause to use hacking

Now that projects don't directly use pep8 anymore but rather hacking,
update the ignore pep8 clause to say hacking.

Related patch to ignore hacking in the requirements sync check:
I114b05fb1ec99ec1e0e0162988edb5fa5517df46

Change-Id: Ib21646db18220b40db505856f4796c3d51228abc
Make sure msgpack-python version >= 0.4.0

Now Marconi is using on msgpack and relaying on a new feature
introdcued in msgpack since 0.4.0. If user are using the version
under that, they may run into HTTP 503 code for some operations.

Change-Id: Ib24318c3d593f3d2d0625d0f2c582e26d81f43d1
Closes-Bug: 1331280
Make sure pymongo version >= 2.5

Now Marconi is exposing pymongo's cert options to user for the
maxium security, which was added since version 2.5

Change-Id: I504112d1f39e5a1b74bcae56b4b855c25b47acd8
Closes-Bug: #1328720
Add oslo.db library

blueprint oslo-db-lib

Change-Id: I4fa1beb8dd9a9bbf5c220cf310aa56f407392233
Merge "Make sure pymongo version >= 2.5"
Merge "Make sure msgpack-python version >= 0.4.0"
Merge "Require django-pyscss 1.0.1 for django-compressor 1.4 support"