Updated from global requirements

Change-Id: I9fe06c9739c3625abd7cb03ac97c58bb9cdbc5bd

Author: OpenStack Proposal Bot

test-requirements.txt

@@ -5,7 +5,7 @@ hacking<0.11,>=0.10.0
 
 coverage>=3.6 # Apache-2.0
 discover # BSD
-fixtures>=1.3.1 # Apache-2.0/BSD
+fixtures<2.0,>=1.3.1 # Apache-2.0/BSD
 mock>=1.2 # BSD
 oslosphinx!=3.4.0,>=2.5.0 # Apache-2.0
 oslotest>=1.10.0 # Apache-2.0