Switch over to oslosphinx

oslosphinx is the new name of oslo.sphinx

Closes-Bug: #1277168
Change-Id: Ibfb9e59fbb3ef51a821b4f412601e26cb7f703f4
diff --git a/doc/source/conf.py b/doc/source/conf.py
index e5444ae..bd4e553 100644
--- a/doc/source/conf.py
+++ b/doc/source/conf.py
@@ -30,7 +30,7 @@
               'sphinx.ext.intersphinx',
               'sphinx.ext.todo',
               'sphinx.ext.viewcode',
-              'oslo.sphinx'
+              'oslosphinx'
              ]
 
 todo_include_todos = True