Follow the new PTI for document build

Reference:
https://governance.openstack.org/tc/reference/project-testing-interface.html
http://lists.openstack.org/pipermail/openstack-dev/2017-December/125710.html
http://lists.openstack.org/pipermail/openstack-dev/2018-March/128594.html

Change-Id: I32256af5d8530435321e84f5dd19d8a9ce57840a

doc/requirements.txt

@@ -0,0 +1,5 @@
+# The order of packages is significant, because pip processes them in the order
+# of appearance. Changing the order has an impact on the overall integration
+# process, which may cause wedges in the gate later.
+openstackdocstheme>=1.18.1 # Apache-2.0
+sphinx!=1.6.6,!=1.6.7,>=1.6.2 # BSD

setup.cfg

@@ -5,7 +5,7 @@ description-file =
     README.rst
 author = OpenStack
 author-email = openstack-dev@lists.openstack.org
-home-page = http://docs.openstack.org/developer/heat-translator/
+home-page = http://docs.openstack.org/heat-translator/
 classifier =
     Environment :: OpenStack
     Intended Audience :: Information Technology
@@ -35,14 +35,6 @@ openstack.translator.v1 =
 console_scripts =
     heat-translator = translator.shell:main
 
-[build_sphinx]
-source-dir = doc/source
-build-dir = doc/build
-all_files = 1
-
-[upload_sphinx]
-upload-dir = doc/build/html
-
 [compile_catalog]
 directory = translator/locale
 domain = translator

test-requirements.txt

@@ -5,9 +5,7 @@ hacking!=0.13.0,<0.14,>=0.12.0 # Apache-2.0
 coverage!=4.4,>=4.0 # Apache-2.0
 fixtures>=3.0.0 # Apache-2.0/BSD
 oslotest>=3.2.0 # Apache-2.0
-openstackdocstheme>=1.18.1 # Apache-2.0
 python-subunit>=1.0.0 # Apache-2.0/BSD
-sphinx!=1.6.6,!=1.6.7,>=1.6.2 # BSD
 testrepository>=0.0.18 # Apache-2.0/BSD
 testscenarios>=0.4 # Apache-2.0/BSD
 testtools>=2.2.0 # MIT

tox.ini

@@ -26,7 +26,8 @@ commands = {posargs}
 commands = python setup.py test --coverage --coverage-package-name=translator --testr-args='{posargs}'
 
 [testenv:docs]
-commands = python setup.py build_sphinx
+deps = -r{toxinidir}/doc/requirements.txt
+commands = sphinx-build -b html doc/source doc/build/html
 
 [testenv:debug]
 commands = oslo_debug_helper -t translator/tests {posargs}