vm-hosts: Clean up vm-autostart list

Start Kubernetes earlier.  Start Synapse later (it takes a long time to
start up and often times out when the VM hosts are under heavy load).
Start SMTP relay later as it's not really needed.

group_vars/vm-hosts.yml

@@ -211,25 +211,23 @@ vmhost_networks:
 vm_autostart:
 - dc-nrtxms
 - dc-qi85ia
-- delay 5s
-- pxe0
 - delay 30s
 - logs0
-- delay 5s
-- smtp1
-- matrix0
-- delay 5s
-- web0
-- file0
-- cloud0
-- delay 5s
-- bw0
-- delay 5s
+- delay 10s
 - k8s-ctrl0
 - delay 10s
 - k8s-amd64-n0
 - k8s-amd64-n1
 - k8s-amd64-n2
 - k8s-amd64-n3
+- delay 5s
+- web0
+- file0
+- cloud0
+- bw0
+- delay 5s
+- smtp1
+- matrix0
+- delay 10s
 - pxe0
 - unifi1