Update to Quantum Client 2.2.0

This patch updates tools/pip-requires to use the python-quantumclient 2.2
It also limits the version to <3.0.0 to prevent breaking something accidently
when 3.0.0 is released.

Fixes bug 1152695

Change-Id: I90e5118798ef2fca3b8b07acefe13336479d524f
Pin SQLAlchemy to 0.7.x

0.7.10 has been released and is compatible with 0.7.x. Instead
of pinning to 0.7.9, simply pin to 0.7.x to avoid SQLAlchemy 0.8

Unfortuantely '<0.8' matches '0.8.0b2', which is what we don't want.
Therefore pinning it to '<=0.7.99' instead.

Change-Id: I14eef50b5a423140421c6e8fe0a5242c2f676fa4
Raise stevedore requirement to 0.7

Nova requires 0.7 already, so consolidate on that version

Change-Id: I186e191994e1c0f44a38cbf4e361381f7973ab9a
Merge "Pin SQLAlchemy to 0.7.x"
Merge "Raise stevedore requirement to 0.7"
Merge "Update to Quantum Client 2.2.0"