import zuul job settings from project-config

This is a mechanically generated patch to complete step 1 of moving
the zuul job settings out of project-config and into each project
repository.

Because there will be a separate patch on each branch, the branch
specifiers for branch-specific jobs have been removed.

Because this patch is generated by a script, there may be some
cosmetic changes to the layout of the YAML file(s) as the contents are
normalized.

See the python3-first goal document for details:
https://governance.openstack.org/tc/goals/stein/python3-first.html

Change-Id: I531cb4ed277992c945e5710ac9bebc65af42045e
Story: #2002586
Task: #24292

.zuul.yaml

@@ -0,0 +1,9 @@
+- project:
+    templates:
+      - openstack-specs-jobs
+    check:
+      jobs:
+        - openstack-tox-pep8
+    gate:
+      jobs:
+        - openstack-tox-pep8

requirements.txt

@@ -2,3 +2,4 @@ pbr>=0.6,<1.0
 oslosphinx>=2.2.0  # Apache-2.0
 sphinx>=1.1.2,!=1.2.0,<1.3
 yasfb>=0.5.1
+flake8

setup.py

@@ -19,4 +19,4 @@ import setuptools
 
 setuptools.setup(
     setup_requires=['pbr>=0.6,<1.0'],
-    pbr=True)
+    pbr=True)

tox.ini

@@ -1,6 +1,6 @@
 [tox]
 minversion = 1.6
-envlist = docs
+envlist = pep8,docs
 skipsdist = True
 
 [testenv]
@@ -23,3 +23,11 @@ deps =
    sphinxcontrib-spelling
    PyEnchant
 commands = sphinx-build -b spelling doc/source doc/build/spelling
+
+[testenv:pep8]
+commands = flake8
+
+[flake8]
+show-source = True
+ignore = E123,E125,D100
+exclude=.venv,.git,.tox,dist,doc,*lib/python*,*egg,build