Updated from global requirements

OpenStack Proposal Bot · OpenStack Proposal Bot · commit d22f8926c791 · 2015-08-26T14:18:00.000Z
Change-Id: I84ab00fae14350c77b05f0feb5a9b90d05346d70
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<2.0,>=1.4
+pbr<2.0,>=1.6
 requests>=2.5.2
 six>=1.9.0
 stevedore>=1.5.0 # Apache-2.0
