Wrong shell script specified in start.sh

start.sh was trying to run nova-config.sh which has been renamed
nova-controller-config.sh

Change-Id: I546ce046c0789144cb48668500ea4b206d07487d

docker/nova-controller/nova-api/start.sh

@@ -2,7 +2,7 @@
 
 set -e
 
-. /opt/kolla/config-nova.sh
+. /opt/kolla/config-nova-controller.sh
 
 check_for_keystone