Fleetify nova conductor for N cells

This makes us start two levels of nova-conductor processes, and one per cell.

Note that this also sets the notification transport_url to the top-level mq
so that we continue to get a unified stream of notifications.

Related-Bug: #1700496
Change-Id: I08d7da843d18b426dda8a8a231039d950a4c0ce5
Depends-On: I64b600b30f6e54db0ec9083c6c176e895c6d0cc2
Depends-On: If59453f1899e99040c554bcb9ad54c8a506adc56
diff --git a/stack.sh b/stack.sh
index fd18651..8a19438 100755
--- a/stack.sh
+++ b/stack.sh
@@ -1304,7 +1304,9 @@
 # Unable to use LUKS passphrase that is exactly 16 bytes long
 # https://bugzilla.redhat.com/show_bug.cgi?id=1447297
 if is_service_enabled nova; then
-    iniset $NOVA_CONF key_manager fixed_key $(generate_hex_string 36)
+    key=$(generate_hex_string 36)
+    iniset $NOVA_CONF key_manager fixed_key "$key"
+    iniset $NOVA_CPU_CONF key_manager fixed_key "$key"
 fi
 
 # Launch the nova-api and wait for it to answer before continuing