Update testing

Remove python jobs, there's no code here, so nothing to test.
Update docs invocation to the "modern" way.
Fix .gitreview

Change-Id: Idab8bb781ab8aa31407f07d5b7eaa410dabf9dd8

.gitreview

@@ -1,4 +1,4 @@
 [gerrit]
 host=review.opendev.org
 port=29418
-project=openstack/publiccloud-wg.git
+project=openstack/publiccloud-sig.git

.zuul.yaml

@@ -1,9 +1,3 @@
 - project:
     templates:
       - openstack-specs-jobs
-    check:
-      jobs:
-        - openstack-tox-py27
-    gate:
-      jobs:
-        - openstack-tox-py27

tox.ini

@@ -1,11 +1,10 @@
 [tox]
-# Hold back to 1.4, since that's what's in Fedora 20 repos
-# and we don't need anything newer for nova-specs tests
 minversion = 1.4
-envlist = docs,py27
+envlist = docs
 skipsdist = True
 
 [testenv]
+basepython = python3
 usedevelop = True
 setenv = VIRTUAL_ENV={envdir}
 install_command = pip install -U {opts} {packages}
@@ -16,4 +15,6 @@ commands = python setup.py testr --slowest --testr-args='{posargs}'
 commands = {posargs}
 
 [testenv:docs]
-commands = python setup.py build_sphinx
+commands =
+  sphinx-build -W --keep-going -b html -d doc/build/doctrees doc/source doc/build/html
+