CI: Fix integration job

Deckhand's integration job relies on OpenStack-Helm-Infra to deploy
Kubernetes using Kubeadm. Since [0] was merged, Calico requires AppArmor
to be deployed. This commit adds the same role to deploy AppArmor that
exists in OpenStack-Helm-Infra to prevent inadvertent gate failures.

[0] https://review.openstack.org/614805/

This also includes gate fix in https://review.openstack.org/#/c/627906/
because of a circular dependency; that change in question fixes
failing CI jobs for all non-integration jobs.

Change-Id: Ie3fb04ea0fbe0487ae743033315e2a4211248d32

requirements.txt

@@ -38,7 +38,6 @@ python-barbicanclient==4.7.0
 python-keystoneclient==3.18.0
 python-memcached==1.59
 
-requests==2.20.0
 Routes==2.4.1
 six==1.11.0
 stevedore==1.30.0

tools/gate/playbooks/osh-infra-upgrade-host.yaml

@@ -39,3 +39,15 @@
     - upgrade-host
     - start-zuul-console
     - disable-local-nameserver
+
+- hosts: all
+  vars_files:
+    - vars.yaml
+  vars:
+    work_dir: "{{ zuul.project.src_dir }}/{{ zuul_osh_infra_relative_path | default('') }}"
+  gather_facts: False
+  become: yes
+  roles:
+    - deploy-apparmor
+  tags:
+    - deploy-apparmor

tools/gate/roles/deploy-apparmor/tasks/main.yaml

@@ -0,0 +1,36 @@
+# Copyright 2018 The Openstack-Helm Authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+- block:
+    - name: Ensuring AppArmor is deployed on host
+      when: ansible_distribution == 'Ubuntu'
+      include_role:
+        name: deploy-package
+        tasks_from: dist
+      vars:
+        packages:
+          deb:
+            - apparmor
+
+    - name: Enable AppArmor
+      when: ansible_distribution == 'Ubuntu'
+      become: true
+      shell: |-
+              set -xe
+              systemctl enable apparmor
+              systemctl start apparmor
+              systemctl status apparmor.service
+      args:
+        executable: /bin/bash
+      ignore_errors: True