Add Python 3.6 tox jobs

Add a sample python 3.6 job running on a Fedora 26 node.

Create the job macros and definitions for a Python 3.6 job running on
Fedora 26.  Add to the low-turnover bashate project so we can run some
tests on a real project.

At this point, I have not templated it out futher.  We could add it to
templates like python-jobs and create groups in zuul/layout.yaml to
make it eaiser if required.

Change-Id: I04fab592032621325f8638680fc5c842f316684a

jenkins/jobs/macros.yaml

@@ -659,6 +659,11 @@
     builders:
       - shell: "/usr/local/jenkins/slave_scripts/run-tox.sh py35"
 
+- builder:
+    name: python36
+    builders:
+      - shell: "/usr/local/jenkins/slave_scripts/run-tox.sh py36"
+
 - builder:
     name: pypy
     builders:

jenkins/jobs/projects.yaml

@@ -535,6 +535,8 @@
 
     jobs:
       - python-jobs
+      - 'gate-{name}-python36-{node}-nv':
+          node: fedora-26
       - pypi-jobs
       - openstack-publish-jobs
       - openstack-releasenotes-jobs

jenkins/jobs/python-jobs.yaml

@@ -305,6 +305,32 @@
 
     node: ubuntu-xenial
 
+# Initial Python3.6 testing.
+- job-template:
+    name: 'gate-{name}-python36-{node}-nv'
+
+    wrappers:
+      - build-timeout:
+          timeout: 40
+      - timestamps
+
+    builders:
+      - print-template-name:
+          template-name: "{template-name}"
+      - zuul-git-prep-upper-constraints
+      - install-distro-packages
+      - extra-test-setup
+      - revoke-sudo
+      - python36
+      - assert-no-extra-files
+
+    publishers:
+      - test-results
+      - console-log
+
+    node: '{node}'
+
+
 - job-template:
     name: 'gate-{name}-pypy'
 

zuul/layout.yaml

@@ -3640,6 +3640,7 @@ projects:
       - name: release-notes-jobs
     check:
       - gate-bashate-devstack
+      - gate-bashate-python36-fedora-26-nv
 
   - name: openstack-dev/ci-sandbox
     template: