Remove mox from requirements
Remove mox from requirements

Mox was listed in test-requirements, but it is not actually
being used anywhere. Since we want to remove this package
from OpenStack, removing from requirements so it does not
look like it is being used.

Change-Id: Ibe1b5a406ccbd33e058f5744b15a114685aba5da

ChameleonCloud/blazar,stackforge/blazar,stackforge/blazar,openstack/blazar,ChameleonCloud/blazar,openstack/blazar