Updated from global requirements

OpenStack Proposal Bot · OpenStack Proposal Bot · commit be9306f1d4ad · 2016-10-22T01:27:27.000Z
Change-Id: I76fa121b61b50403af404c8d6e5d9a390231230c
diff --git a/test-requirements.txt b/test-requirements.txt
@@ -3,7 +3,7 @@
 # process, which may cause wedges in the gate later.
 hacking<0.11,>=0.10.0
 
-coverage>=3.6 # Apache-2.0
+coverage>=4.0 # Apache-2.0
 fixtures>=3.0.0 # Apache-2.0/BSD
 mock>=2.0 # BSD
 oslosphinx>=4.7.0 # Apache-2.0
