Depend on any 0.9.x SQLAlchemy that is >= 0.9.7

Drop the 0.8.x series of SQLAlchemy which makes the SQLAlchemy
simpler and ensures that it doesn't depend on an implementation
detail of setuptools. This is important because a future version
of setuptools (8.0) and pip (6.0) plan to change this implementation
detail.

Change-Id: I2f13918c169071d4365c689bdb709a04064279fa
Merge "Depend on any 0.9.x SQLAlchemy that is >= 0.9.7"