Trove's tox tests should respect upper-constraints.txt
Trove's tox tests should respect upper-constraints.txt

This will force pip install to use the upper-constraints.txt specified
version of pip modules. When you don't do this, you are out on the
bleeding edge and become unstable everytime some python library in the
wide world changes in a way that you don't expect.

The releasenotes job has no constraints file, so override the install
command there.

Change-Id: Ie1133e4c020106e8098685ba9125f84b356d8e0c
Closes-Bug: #1563038

openstack/trove,zhangg/trove,hplustree/trove,hplustree/trove,mmasaki/trove,mmasaki/trove,zhangg/trove,mmasaki/trove,openstack/trove