Move from nose to testr.

Granted - this takes the test suite from 3 seconds to 1 second... but there
are a bunch of other ways (correctness) that testr is better than nose.

Removed tests/v1/utils - it was not being used anywhere.

Part of blueprint grizzly-testtools.

Change-Id: I54d9a0b7dc22305ec60d779d6f19025a0b5dc785
Merge "Move from nose to testr."