Check the logs for migrations that take too long

Change-Id: I38cbce3771afea8dc2ffecc243d727bc1759431e
diff --git a/test-requirements.txt b/test-requirements.txt
index b6274a2..9c2dfa8 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -5,7 +5,7 @@
 hacking>=0.5.6,<0.7
 coverage>=3.6
 
-sphinx
+sphinx>=1.1.2,<1.2
 docutils==0.9.1
 discover
 python-subunit