Temporarily skip URL test in tox-py36
Temporarily skip URL test in tox-py36

GitHub is having some performance issues, and it is causing the URL
check in the tox-py36 job to be too slow, so the job times out.

Let's skip the URL test for now, until things get back to normal.

Change-Id: Ib49acac4eec488c575efefb871d2d9685da920cf

redhat-openstack/rdoinfo