MT#9385 add dbnode to network.yml

This will add dbnode:
 - CE: dbnode = 1
 - PRO: sp1 = 1 sp2 = 2

On CARRIER installation will produce the same as PRO for mgmt node,
the one that is going to be first.

Change-Id: I643dcc6f5a45f7741302484b6e10ed05c435bd10