Exclude Routes 2.0

The py33 wheel published on PyPI for Routes is broken, and as a
result causes failures for our Py3k unit test jobs when it's a
project requirement. https://github.com/bbangert/routes/issues/31

Conflicts:
	global-requirements.txt

Change-Id: I66fe7a29362c45bc6af8b473f14433656e14d3d0
(cherry picked from commit 80366feb60fe3501c8c003efbd6905a1bc111b6e)