Use upstream pypi before the repo is built

Trying to reverse proxy upstream pypi has not turned out to
be very stable, or very useful. We've had many, many reports
of stability issues and the additional complexity for offline
and proxy usage is just not worth it.

Given we already have a mechanism in place to handle using
upstream pypi if the repo server is not there yet, disabling
this should just result in that mechanism kicking in and all
will be well again.

Once the repo is built, the reverse proxy to pypiserver will
then be exclusively used and the upstream pypi proxy is not
necessary anyway.

Change-Id: Ic6e4a2d24040655fdd575477ea7438fd6e4d58d9
Needed-By: https://review.openstack.org/584385

doc/source/user/limited-connectivity/index.rst

@@ -56,10 +56,6 @@ proxy:
       # Custom upstream pip index used when building repo server contents
       repo_build_pip_default_index: http://pip.example.org/simple
 
-      # Custom upstream pip mirror host:port which must be able to supply all
-      # packages not built by the repo server itself.
-      repo_nginx_pypi_upstream: pip.example.org:80
-
 You may also choose to create a local copy of
 https://bootstrap.pypa.io/3.3/get-pip.py to remove a dependency on an external
 resource.

inventory/group_vars/repo_all.yml

@@ -73,9 +73,3 @@ pkg_locations:
   - "{{ playbook_dir }}/../"
   - /etc/ansible/roles
   - /etc/openstack_deploy
-
-# The URL to retrieve the get-pip.py installation script locally
-pip_upstream_url: "{{ repo_release_path | replace(internal_lb_vip_address, '127.0.0.1') }}/get-pip.py"
-
-# The URL to the local PyPI reverse proxy
-pip_default_index: "{{ openstack_repo_url | replace(internal_lb_vip_address, '127.0.0.1') }}/simple"

tests/roles/bootstrap-host/templates/user_variables.aio.yml.j2

@@ -181,7 +181,6 @@ nova_service_negate:
   - "nova-resetnetwork.service"
 
 {% if _pypi_wheel_mirror is defined and _pypi_wheel_mirror.stdout_lines is defined %}
-repo_nginx_pypi_upstream: "{{ _pypi_wheel_mirror.stdout_lines[0] | netloc }}"
 repo_build_pip_extra_indexes:
  - "{{ _pypi_wheel_mirror.stdout_lines[1] }}"
 {% endif %}