Merge "doc: Use common requirements definition"

Author: Zuul

tox.ini

@@ -46,8 +46,8 @@ commands =
 
 [testenv:docs]
 deps =
-       -c{env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
-       -r{toxinidir}/doc/requirements.txt
+  -c{env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
+  -r{toxinidir}/doc/requirements.txt
 commands = sphinx-build -W -b html doc/source doc/build/html
 
 [flake8]
@@ -60,7 +60,5 @@ max-complexity=20
 import_exceptions = heatclient._i18n
 
 [testenv:releasenotes]
-deps =
-       -c{env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
-       -r{toxinidir}/doc/requirements.txt
+deps = {[testenv:docs]deps}
 commands = sphinx-build -a -E -W -d releasenotes/build/doctrees -b html releasenotes/source releasenotes/build/html