Fix get-pip.py 503 error https://bootstrap.pypa.io/get-pip.py
Fix get-pip.py 503 error https://bootstrap.pypa.io/get-pip.py

cloudbase/neutron-ci,cloudbase/neutron-ci,costingalan/neutron-ci,costingalan/neutron-ci,rbuzatu90/neutron-ci,rbuzatu90/neutron-ci