Remove CentOS7 jobs from packstack pipelines in master branch

RDO has moved to CentOS8 in master and there is no point in keep testing
with CentOS7 too.

Change-Id: Ib5cd94a054c2e5627e209ac8516a3de4aea47dac

.zuul.yaml

@@ -33,16 +33,6 @@
       - openstack/puppet-trove
       - openstack/puppet-vswitch
 
-- job:
-    name: packstack-allinone
-    parent: packstack-base
-    pre-run: playbooks/packstack-pre.yaml
-    nodeset:
-      nodes:
-        - name: allinone
-          label: centos-7
-    run: playbooks/packstack-integration-tempest.yaml
-
 - job:
     name: packstack-centos8
     parent: packstack-base
@@ -57,18 +47,6 @@
           label: centos-8
     run: playbooks/packstack-integration-tempest.yaml
 
-- job:
-    name: packstack-multinode
-    parent: packstack-base
-    pre-run: playbooks/packstack-pre.yaml
-    nodeset:
-      nodes:
-        - name: controller
-          label: centos-7
-        - name: compute
-          label: centos-7
-    run: playbooks/packstack-multinode.yaml
-
 - job:
     name: packstack-multinode-centos8
     parent: packstack-base
@@ -85,24 +63,6 @@
           label: centos-8
     run: playbooks/packstack-multinode.yaml
 
-- job:
-    name: packstack-integration-scenario001-tempest
-    parent: packstack-allinone
-    vars:
-      scenario: scenario001
-
-- job:
-    name: packstack-integration-scenario002-tempest
-    parent: packstack-allinone
-    vars:
-      scenario: scenario002
-
-- job:
-    name: packstack-integration-scenario003-tempest
-    parent: packstack-allinone
-    vars:
-      scenario: scenario003
-
 - job:
     name: packstack-centos8-integration-scenario001
     parent: packstack-centos8
@@ -121,15 +81,6 @@
     vars:
       scenario: scenario003
 
-# We should have nested post-run jobs, according to
-# https://docs.openstack.org/infra/zuul/user/config.html#job
-- job:
-    name: packstack-multinode-scenario002-tempest
-    parent: packstack-multinode
-    post-run: playbooks/packstack-post-compute.yaml
-    vars:
-      scenario: scenario002
-
 - job:
     name: packstack-centos8-multinode-scenario002-tempest
     parent: packstack-multinode-centos8
@@ -220,10 +171,6 @@
 - project:
     check:
       jobs:
-        - packstack-integration-scenario001-tempest
-        - packstack-integration-scenario002-tempest
-        - packstack-integration-scenario003-tempest
-        - packstack-multinode-scenario002-tempest
         - packstack-centos8-integration-scenario001
         - packstack-centos8-integration-scenario002
         - packstack-centos8-integration-scenario003
@@ -231,10 +178,6 @@
         - openstack-tox-py36
     gate:
       jobs:
-        - packstack-integration-scenario001-tempest
-        - packstack-integration-scenario002-tempest
-        - packstack-integration-scenario003-tempest
-        - packstack-multinode-scenario002-tempest
         - packstack-centos8-integration-scenario001
         - packstack-centos8-integration-scenario002
         - packstack-centos8-integration-scenario003

playbooks/packstack-pre.yaml

@@ -1,26 +0,0 @@
-- hosts: all
-  name: packstack-pre
-  tasks:
-    - name: Ensure legacy workspace directory
-      file:
-        path: '{{ ansible_user_dir }}/workspace'
-        state: directory
-
-    - shell:
-        cmd: |
-          cp -pr /home/zuul/src/opendev.org/x/packstack {{ ansible_user_dir }}/workspace
-
-    - shell:
-        cmd: |
-          set -e
-          set -x
-          yum -y remove rdo-release "centos-release-openstack-*" "centos-release-ceph-*"
-          yum -y install libxml2-devel libxslt-devel ruby-devel zlib-devel
-          yum -y groupinstall "Development Tools"
-          # Uninstall python-requests from pip, since we install it in
-          # system-config/install_puppet.sh
-          pip uninstall requests -y || true
-        executable: /bin/bash
-        chdir: '{{ ansible_user_dir }}/workspace'
-      become: true
-      environment: '{{ zuul }}'