Move zuul jobs in-repo

This moves the openstack-tox-py35 and openstack-tox-pep8 zuul jobs to be
defined in-repo.

Also, no need to run mnay of these jobs on patches that are only changing
documentation.

Change-Id: Ic211dabcc903dde8848c4f9be9ed9a3f8806c23a
Signed-off-by: Sean McGinnis <sean.mcginnis@gmail.com>

.zuul.yaml

@@ -4,24 +4,41 @@
     timeout: 3600
     vars:
       tox_envlist: list-changes
+    irrelevant-files:
+      - ^doc/.*$
 
 - project:
     check:
       jobs:
         - openstack-tox-validate:
             timeout: 3600
+            irrelevant-files:
+              - ^doc/.*$
         - releases-tox-list-changes
         - build-openstack-sphinx-docs:
             vars:
               sphinx_python: python3
-
+        - openstack-tox-py35:
+            irrelevant-files:
+              - ^deliverables/.*$
+              - ^doc/.*$
+        - openstack-tox-pep8:
+            irrelevant-files:
+              - ^deliverables/.*$
+              - ^doc/.*$
     gate:
       jobs:
         - openstack-tox-validate:
             timeout: 3600
+            irrelevant-files:
+              - ^doc/.*$
         - build-openstack-sphinx-docs:
             vars:
               sphinx_python: python3
+        - openstack-tox-py35:
+            irrelevant-files:
+              - ^deliverables/.*$
+              - ^doc/.*$
     release-post:
       jobs:
         - tag-releases