Follow the new PTI for document build

For compliance with the Project Testing Interface as described in:
https://governance.openstack.org/tc/reference/project-testing-interface.html

For more detials information, please refer to:
http://lists.openstack.org/pipermail/openstack-dev/2017-December/125710.html

Change-Id: I444cdaad0d83d9d8795dc03793aefe2fa3a51203

doc/requirements.txt

@@ -0,0 +1,10 @@
+# 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
+sphinxcontrib-apidoc>=0.2.0  # BSD
+reno>=2.5.0 # Apache-2.0
+os-api-ref>=1.4.0 # Apache-2.0
+pymongo!=3.1,>=3.0.2 # Apache-2.0
+redis>=2.10.0 # MIT

setup.cfg

@@ -21,12 +21,6 @@ classifier =
 packages =
     zaqar
 
-[build_sphinx]
-all_files = 1
-build-dir = doc/build
-source-dir = doc/source
-warning-is-error = 1
-
 [entry_points]
 console_scripts =
     zaqar-bench = zaqar.bench.conductor:main

test-requirements.txt

@@ -26,13 +26,7 @@ testtools>=2.2.0 # MIT
 oslo.db>=4.27.0 # Apache-2.0
 testresources>=2.0.0 # Apache-2.0/BSD
 os-testr>=1.0.0 # Apache-2.0
-
-# Documentation
-sphinx!=1.6.6,!=1.6.7,>=1.6.2 # BSD
-openstackdocstheme>=1.18.1 # Apache-2.0
 oslotest>=3.2.0 # Apache-2.0
-reno>=2.5.0 # Apache-2.0
-os-api-ref>=1.4.0 # Apache-2.0
 
 #OSprofiler
 osprofiler>=1.4.0 # Apache-2.0

tox.ini

@@ -44,9 +44,11 @@ commands =
 commands = {posargs}
 
 [testenv:docs]
+deps =
+  -r{toxinidir}/doc/requirements.txt
+
 commands =
   doc8 doc/source
-  python setup.py build_sphinx
   sphinx-build -W -b html api-ref/source api-ref/build/html
 
 [testenv:api-ref]