Fix installation errors with Python 2

Python 2 jobs recently started failing frequently with the following
error:

    distutils.errors.DistutilsError: Could not find suitable distribution for Requirement.parse('pbr>=2.0')

The root cause appears to be that indirect requirements are handled by
easy_install which doesn't like some index servers [1]. Install the
latest setuptools first to work around the issue.

Disable upgrade jobs since the same issue is affecting Kayobe
installation in the previous release (Rocky).

[1] https://github.com/googleapis/google-cloud-python/issues/3757#issuecomment-422384453

Change-Id: I1b86c5f58d0c3b63269766eaa8e76af18b5fadb1

ansible/roles/kolla-ansible/tasks/install.yml

@@ -43,13 +43,14 @@
   become: True
   when: kolla_ansible_venv is not none
 
-- name: Ensure the latest version of pip is installed
+- name: Ensure the latest versions of pip and setuptools are installed
   pip:
     name: "{{ item.name }}"
     state: latest
     virtualenv: "{{ kolla_ansible_venv }}"
   with_items:
     - { name: pip }
+    - { name: setuptools }
 
 - name: Ensure python requirements file exists
   template:

ansible/roles/kolla/tasks/install.yml

@@ -46,13 +46,14 @@
   become: True
   when: kolla_venv is not none
 
-- name: Ensure the latest version of pip is installed
+- name: Ensure the latest versions of pip and setuptools are installed
   pip:
     name: "{{ item.name }}"
     state: latest
     virtualenv: "{{ kolla_venv }}"
   with_items:
     - { name: pip }
+    - { name: setuptools }
 
 - name: Ensure Python package docker-py is absent
   # In version 2.0.0, docker renamed the docker-py python package to docker.

dev/functions

@@ -124,6 +124,9 @@ function install_venv {
         set +u
         source "${venv_path}/bin/activate"
         pip install -U pip
+        # Update setuptools as workaround for distutils.errors.DistutilsError:
+        # Could not find suitable distribution for Requirement.parse('pbr')
+        pip install -U setuptools
         pip install $pip_paths
         deactivate
         set -u

zuul.d/project.yaml

@@ -14,7 +14,6 @@
         - kayobe-tox-molecule
         - kayobe-overcloud-centos
         - kayobe-seed-centos
-        - kayobe-seed-upgrade-centos
 
     gate:
       queue: kayobe
@@ -24,4 +23,3 @@
         - kayobe-tox-molecule
         - kayobe-overcloud-centos
         - kayobe-seed-centos
-        - kayobe-seed-upgrade-centos