ospfd: Display all vrf aware interface config

ospfd: Display all vrf aware interface config

OSPF interface specific configuration can be done independent
of router ospf [vrf x] global config.
In cases where ospf interface non default vrf configuration
is done prior to 'router ospf vrf x', show running-config
would not display such configuration.

To display configuration now walk all vrfs and interface list
and only display where OSPF configure params are set.

Ticket:CM-18952
Testing Done:
Tried ospf interface specific configuration with VRF,
where router ospf vrf x is not present.

Signed-off-by: Chirag Shah <chirag@cumulusnetworks.com>