Updated from global requirements

OpenStack Proposal Bot · OpenStack Proposal Bot · commit a4330080f5cc · 2017-03-09T18:23:30.000Z
Change-Id: I6a8fbf730d5cfc24ce21d2086a1c746f17694227
diff --git a/requirements.txt b/requirements.txt
@@ -1,7 +1,7 @@
 # The order of packages is significant, because pip processes them in the order
 # of appearance. Changing the order has an impact on the overall integration
 # process, which may cause wedges in the gate later.
-pbr>=1.8 # Apache-2.0
+pbr<2.0.0,>=1.8 # Apache-2.0
 six>=1.9.0 # MIT
 
 Babel>=2.3.4 # BSD
