Pin get-pip.py to 3.2

As get-pip.py evolves based on pip 10, while we're still using
pip 9, changes in the way it can be used are causing problems.

For example, the ability to use --download is no longer there.

As such, let's pin to a known good version and leave it at that
until we no longer need to use this script. Version 3.2 maps to
pip 7.1.2 which fulfills our needs.

Change-Id: I2a49a407e82c23540cd0aff209bd276c8a303bf0
Closes-Bug: 1779534

inventory/group_vars/all/pip.yml

@@ -24,7 +24,7 @@ pip_install_upper_constraints: "{{ repo_release_path }}/requirements_absolute_re
 pip_offline_install: false
 
 # The URL to retrieve the get-pip.py installation script
-pip_upstream_url: "{{ (pip_offline_install | bool) | ternary('https://bootstrap.pypa.io/get-pip.py', repo_release_path ~ '/get-pip.py') }}"
+pip_upstream_url: "{{ (pip_offline_install | bool) | ternary('https://bootstrap.pypa.io/3.2/get-pip.py', repo_release_path ~ '/get-pip.py') }}"
 
 # The URL to the repo server's pypi reverse proxy simple index
 pip_default_index: "{{ openstack_repo_url }}/simple"

playbooks/common-tasks/set-pip-vars.yml

@@ -87,7 +87,7 @@
 - name: Set pip upstream URL
   set_fact:
     pip_upstream_url: >-
-      {{ ((_repo_data_check.status | default(503)) != 200) | ternary('https://bootstrap.pypa.io/get-pip.py', __pip_upstream_url) }}
+      {{ ((_repo_data_check.status | default(503)) != 200) | ternary('https://bootstrap.pypa.io/3.2/get-pip.py', __pip_upstream_url) }}
   tags:
     - common-pip
 

scripts/scripts-library.sh

@@ -378,8 +378,8 @@ function get_pip {
     ${GETPIP_CMD} ${GET_PIP_URL} > ${GETPIP_FILE}
   else
     # Otherwise, try the two standard URL's
-    ${GETPIP_CMD} https://bootstrap.pypa.io/get-pip.py > ${GETPIP_FILE}\
-      || ${GETPIP_CMD} https://raw.githubusercontent.com/pypa/get-pip/master/get-pip.py > ${GETPIP_FILE}
+    ${GETPIP_CMD} https://bootstrap.pypa.io/3.2/get-pip.py > ${GETPIP_FILE}\
+      || ${GETPIP_CMD} https://raw.githubusercontent.com/pypa/get-pip/master/3.2/get-pip.py > ${GETPIP_FILE}
   fi
 
   ${GETPIP_PYTHON_EXEC_PATH} ${GETPIP_FILE} ${PIP_OPTS} \