Fix the version of urllib

Fix the version of urllib

It fails to run on Fuel Hunter with the following error:
quota_prepare.py:76 INFO Get admin project name is
/usr/local/lib/python2.7/dist-packages/requests/__init__.py:91:
 RequestsDependencyWarning: urllib3 (1.25.2) or chardet (3.0.4) doesn't match a supported version!
  RequestsDependencyWarning)
e09a9facaa7045c4bbe4ad54787eff58

Link: https://build.opnfv.org/ci/view/dovetail/job/dovetail-fuel-baremetal-default-mandatory-hunter/13/artifact/results/stress_logs/bottlenecks.stress.ping.log/*view*/
Besides the ID, there is also some warning msg in the string. So it get the
wrong admin project name.

Fix the version of urllib to eliminate this warning msg.

Signed-off-by: xudan <xudan16@huawei.com>
Change-Id: I32ed9b71c434141d1de6d3d3a1662ddac52d7e31