Copy nova-api-paste.ini if n-api* is enabled

In multi node devstack using multi-host nova-networking, n-api-meta runs
on every machine but n-api only runs on the API node. So copy
nova-api-paste.ini if any version of n-api* is running.

Change-Id: I323f39f5080b94e22907a173a1a2bc4a324567b8

Author: jogo

lib/nova

@@ -257,7 +257,7 @@ function configure_nova {
 
     configure_nova_rootwrap
 
-    if is_service_enabled n-api; then
+    if [[ "$ENABLED_SERVICES" =~ "n-api" ]]; then
         # Remove legacy paste config if present
         rm -f $NOVA_DIR/bin/nova-api-paste.ini