Disable cross check for upper-constraints.txt against swift
Disable cross check for upper-constraints.txt against swift

Their unit test jobs are currently not using upper-constraints.txt file,
so any breakage in their unit tests caused by an external library
release will break the upper-constraints.txt gate.

Actually, that's what just happened to us.

The patch that should apply constraints to swift unit tests is:
I387cbd013f65da9822e41ef4898c735d715788f0

Change-Id: Id6ca03b24e8ca8ba0c1bd24dcdcd36470a10b744
Related-Bug: #1629830

openstack-infra/project-config,Tesora/tesora-project-config,openstack-infra/project-config,Tesora/tesora-project-config