ospfv3: T3858: Fix for delete correct v6 router-id

[sever-sever]

Fix for deleting correct ospfv3 router-id
https://phabricator.vyos.net/T3858

set protocols ospfv3 area 0.0.0.0 interface eth0 
set protocols ospfv3 parameters router-id 192.168.122.15

vtysh

!
router ospf6
 ospf6 router-id 192.168.122.15
 interface eth0 area 0.0.0.0
!

Per deleting for some reason it trying to delete router-id instead of ospf6 router-id
After fix:

vyos@r5-1.3# delete protocols ospfv3 
[edit]
vyos@r5-1.3# commit
[edit]
vyos@r5-1.3#