get-pip.py dropped python 2.7 support, so we cannot use the default
get-pip.py for python 2.7 now. get-pip.py for python 2.7 is available
at https://bootstrap.pypa.io/2.7/get-pip.py.
This commit tries to use python 2.7 version of get-pip.py
for python 2.7 environment.
get-pip.py fails with in tempest-full-py3 job, too, as that job uses
python 3.5 which is also not supported by the new get-pip.py. For py35
the supported get-pip.py link is:
https://bootstrap.pypa.io/3.5/get-pip.py (which contains pip 20.3.4).
Also, we have to invalidate the CI cache which serves py36 pip.
This patch simply renames the file to fail the match.
Change-Id: I88ba370de8887a05c473fe7c19a61a319e8812d2
(cherry picked from commit 1382e933c5)
(cherry picked from commit 469b26f742)
(cherry picked from commit 910f00eeeb)
8f368650d0