Migrate to pbr from openstack.common.setup.

Change-Id: Ia85bda060a6c62c721b9104b2bd52d3fe1673367
diff --git a/openstack-common.conf b/openstack-common.conf
index 501328c..24af119 100644
--- a/openstack-common.conf
+++ b/openstack-common.conf
@@ -1,7 +1,7 @@
 [DEFAULT]
 
 # The list of modules to copy from openstack-common
-modules=setup,install_venv_common
+modules=install_venv_common
 
 # The base module to hold the copy of openstack.common
 base=tempest