allow sqla 0.9.x

migrate has now been updated to support it, a known issue in
ceilometer has been fixed, and we'd like some of the new optimizations
in the query engine.

Change-Id: I9aeb71a33b466d80edd5c7e0939246c708950ab8
Add wsgi_intercept to global_requirements

The Trove unit tests require the wsgi_intercept>0.6.1 python package
which doesn't exist in in the global requirements today.
Adding this package requirement to the global requirements.
The library was tested on: Python 2.6.9, Python 2.7.3, and
Python 3.2.3

Change-Id: I62c139c3754f5aefe718ad12e1d61bc054708f4c
Merge "allow sqla 0.9.x"
Merge "Add wsgi_intercept to global_requirements"