Update new documentation PTI jobs

For compliance with the Project Testing Interface as described in [1].
For more detailed information, please refer to [2].

[1] https://governance.openstack.org/tc/reference/project-testing-interface.html
[2] http://lists.openstack.org/pipermail/openstack-dev/2017-December/125710.html

Change-Id: Iace251446bafbd8963bc5a073de50ade583f6e46

doc/requirements.txt

@@ -0,0 +1,3 @@
+sphinx>=1.6.2 # BSD
+openstackdocstheme>=1.17.0 # Apache-2.0
+reno>=2.5.0 # Apache-2.0

test-requirements.txt

@@ -13,14 +13,9 @@ python-cinderclient>=3.3.0 # Apache-2.0
 python-glanceclient>=2.8.0 # Apache-2.0
 python-neutronclient>=6.3.0 # Apache-2.0
 requests-mock>=1.1.0 # Apache-2.0
-sphinx>=1.6.2 # BSD
 os-client-config>=1.28.0 # Apache-2.0
-openstackdocstheme>=1.17.0 # Apache-2.0
 osprofiler>=1.4.0 # Apache-2.0
 testrepository>=0.0.18 # Apache-2.0/BSD
 testscenarios>=0.4 # Apache-2.0/BSD
 testtools>=2.2.0 # MIT
 tempest>=17.1.0 # Apache-2.0
-
-# releasenotes
-reno>=2.5.0 # Apache-2.0

tox.ini

@@ -32,12 +32,20 @@ commands = bandit -r novaclient -n5 -x tests
 commands = {posargs}
 
 [testenv:docs]
+deps =
+  -c{env:UPPER_CONSTRAINTS_FILE:https://git.openstack.org/cgit/openstack/requirements/plain/upper-constraints.txt}
+  -r{toxinidir}/requirements.txt
+  -r{toxinidir}/doc/requirements.txt
 commands =
-  python setup.py build_sphinx
+  sphinx-build -b html doc/source doc/build/html
 
 [testenv:releasenotes]
-commands = sphinx-build -a -E -W -d releasenotes/build/doctrees -b html releasenotes/source releasenotes/build/html
-
+deps =
+  -c{env:UPPER_CONSTRAINTS_FILE:https://git.openstack.org/cgit/openstack/requirements/plain/upper-constraints.txt}
+  -r{toxinidir}/requirements.txt
+  -r{toxinidir}/doc/requirements.txt
+commands =
+  sphinx-build -a -E -W -d releasenotes/build/doctrees -b html releasenotes/source releasenotes/build/html
 
 [testenv:functional]
 basepython = python2.7