Bump Ansible versions in integration tests, requirements

Ansible 2.5 has gone EOL [1], require Ansible >=2.6 and
bump tested versions to their latest dot releases.

[1]: https://docs.ansible.com/ansible/latest/reference_appendices/release_and_maintenance.html

Change-Id: I39eae0ed055672da1330316d7a26ea22c797a989

README.rst

@@ -118,11 +118,11 @@ regressions. Here's our current testing coverage:
 +-----------------+--------+--------+----------+--------+--------+
 | -               | Fedora | CentOS | OpenSUSE | Debian | Ubuntu |
 +=================+========+========+==========+========+========+
-| Ansible 2.5.14  |        |  py27  |          |        |        |
+| Ansible 2.6.19  |        |  py27  |          |        |        |
 +-----------------+--------+--------+----------+--------+--------+
-| Ansible 2.6.12  |        |        |          |  py27  |        |
+| Ansible 2.7.13  |        |        |          |  py27  |        |
 +-----------------+--------+--------+----------+--------+--------+
-| Ansible 2.7.6   |  py37  |        |   py27   |        |  py36  |
+| Ansible 2.8.4   |  py37  |        |   py27   |        |  py36  |
 +-----------------+--------+--------+----------+--------+--------+
 | Ansible "devel" |  py37  |        |          |        |  py36  |
 +-----------------+--------+--------+----------+--------+--------+

requirements.txt

@@ -1,7 +1,7 @@
 pbr!=2.1.0,>=2.0.0 # Apache-2.0
 
 jinja2>=2.9
-ansible>=2.5.0
+ansible>=2.6.0
 # Pin SQLAlchemy until new release of flask-sqlalchemy
 # https://github.com/pallets/flask-sqlalchemy/issues/707
 SQLAlchemy<1.3.0

zuul.d/jobs.yaml

@@ -6,35 +6,35 @@
     timeout: 900
 
 - job:
-    name: ara-integration-debian-py27-2.6.16
+    name: ara-integration-debian-py27-2.7.13
     parent: ara-integration-base
     vars:
       python_test_version: py27
-      ansible_test_version: 2.6.16
+      ansible_test_version: 2.7.13
     nodeset: debian-stable
 
 - job:
-    name: ara-integration-centos-py27-2.5.15
+    name: ara-integration-centos-py27-2.6.19
     parent: ara-integration-base
     vars:
       python_test_version: py27
-      ansible_test_version: 2.5.15
+      ansible_test_version: 2.6.19
     nodeset: centos-7
 
 - job:
-    name: ara-integration-opensuse-py27-2.7.8
+    name: ara-integration-opensuse-py27-2.8.4
     parent: ara-integration-base
     vars:
       python_test_version: py27
-      ansible_test_version: 2.7.8
+      ansible_test_version: 2.8.4
     nodeset: opensuse-423
 
 - job:
-    name: ara-integration-ubuntu-py36-2.7.8
+    name: ara-integration-ubuntu-py36-2.8.4
     parent: ara-integration-base
     vars:
       python_test_version: py36
-      ansible_test_version: 2.7.8
+      ansible_test_version: 2.8.4
     nodeset: ubuntu-bionic
 
 - job:
@@ -46,11 +46,11 @@
     nodeset: ubuntu-bionic
 
 - job:
-    name: ara-integration-fedora-py37-2.7.8
+    name: ara-integration-fedora-py37-2.8.4
     parent: ara-integration-base
     vars:
       python_test_version: py37
-      ansible_test_version: 2.7.8
+      ansible_test_version: 2.8.4
     nodeset: fedora-latest
 
 - job:
@@ -60,5 +60,3 @@
       python_test_version: py37
       ansible_test_version: devel
     nodeset: fedora-latest
-
-# This line left intentionally blank for reloading Zuul jobs after branch change

zuul.d/layout.yaml

@@ -3,23 +3,21 @@
       rtd_webhook_id: '46259'
     check:
       jobs:
-        - ara-integration-debian-py27-2.6.16
-        - ara-integration-centos-py27-2.5.15
-        - ara-integration-opensuse-py27-2.7.8
-        - ara-integration-ubuntu-py36-2.7.8
+        - ara-integration-debian-py27-2.7.13
+        - ara-integration-centos-py27-2.6.19
+        - ara-integration-opensuse-py27-2.8.4
+        - ara-integration-ubuntu-py36-2.8.4
         - ara-integration-ubuntu-py36-devel:
             voting: false
-        - ara-integration-fedora-py37-2.7.8
+        - ara-integration-fedora-py37-2.8.4
         - ara-integration-fedora-py37-devel:
             voting: false
         - openstack-tox-py37
     gate:
       jobs:
-        - ara-integration-debian-py27-2.6.16
-        - ara-integration-centos-py27-2.5.15
-        - ara-integration-opensuse-py27-2.7.8
-        - ara-integration-ubuntu-py36-2.7.8
-        - ara-integration-fedora-py37-2.7.8
+        - ara-integration-debian-py27-2.7.13
+        - ara-integration-centos-py27-2.6.19
+        - ara-integration-opensuse-py27-2.8.4
+        - ara-integration-ubuntu-py36-2.8.4
+        - ara-integration-fedora-py37-2.8.4
         - openstack-tox-py37
-
-# This line left intentionally blank for reloading Zuul jobs after branch change