tox: Add missing 'deps' for releasenotes testenv

Change-Id: Ief0a06e95197b37b47c4ae8cbdff10b4a9fad37c
Signed-off-by: Stephen Finucane <stephenfin@redhat.com>

tox.ini

@@ -6,7 +6,7 @@ ignore_basepython_conflict = true
 [testenv]
 basepython = python3
 deps =
-  -c{env:UPPER_CONSTRAINTS_FILE:://releases.openstack.org/constraints/upper/master}
+  -c{env:UPPER_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
   -r{toxinidir}/test-requirements.txt
   -r{toxinidir}/requirements.txt
 commands = stestr run --slowest {posargs}
@@ -29,7 +29,7 @@ deps =
   {[testenv]deps}
   -r{toxinidir}/doc/requirements.txt
 commands =
-  rm -rf doc/build
+  rm -rf doc/build doc/source/reference/api
   sphinx-build -W --keep-going -b html doc/source doc/build/html
 
 [testenv:cover]
@@ -59,6 +59,9 @@ import_exceptions =
 [testenv:releasenotes]
 whitelist_externals =
   rm
+deps =
+  -c{env:UPPER_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
+  -r{toxinidir}/doc/requirements.txt
 commands =
   rm -rf releasenotes/build
   sphinx-build -a -E -W -d releasenotes/build/doctrees --keep-going -b html releasenotes/source releasenotes/build/html