Merge pull request #41 from edx/ned/update-kombu-for-xenial

Use latest kombu==3.0.x

requirements.txt

@@ -11,7 +11,7 @@ django-coverage==1.2.4
 django-ses==0.7.0
 dogapi==1.11.1
 dogstatsd-python==0.5.6
-kombu==3.0.29
+kombu==3.0.37
 logilab-astng==0.24.3
 logilab-common==1.1.0
 mock==1.0.1