Do not enforce vxlan in init-runonce

The affected command was meant to create a tenant network, so let
us really test it this way.

Not marking CI, because someone may be using this script.

Change-Id: I5abe46948992121a11a36f941d4f8fac1caa92b1

tools/init-runonce

@@ -85,7 +85,7 @@ if [[ $ENABLE_EXT_NET -eq 1 ]]; then
         --subnet-range ${EXT_NET_CIDR} --gateway ${EXT_NET_GATEWAY} public1-subnet
 fi
 
-$KOLLA_OPENSTACK_COMMAND network create --provider-network-type vxlan demo-net
+$KOLLA_OPENSTACK_COMMAND network create demo-net
 $KOLLA_OPENSTACK_COMMAND subnet create --subnet-range 10.0.0.0/24 --network demo-net \
     --gateway 10.0.0.1 --dns-nameserver 8.8.8.8 demo-subnet