Do not use sudo when sed'ing $KEYSTONE_CATALOG

We already edited this file earlier without sudo.

Change-Id: I366053edd1a2ad729cfd983ea7491c6252cad905
diff --git a/lib/keystone b/lib/keystone
index 2d21c2c..3add035 100644
--- a/lib/keystone
+++ b/lib/keystone
@@ -133,7 +133,7 @@
             echo "catalog.RegionOne.network.name = Quantum Service" >> $KEYSTONE_CATALOG
         fi
 
-        sudo sed -e "
+        sed -e "
             s,%SERVICE_HOST%,$SERVICE_HOST,g;
             s,%S3_SERVICE_PORT%,$S3_SERVICE_PORT,g;
         " -i $KEYSTONE_CATALOG