tests: fix ospf_suppress_fa timing issue

Set static router-id for OSPF, because otherwise it depends on timing of
router-id updates received from zebra and may differ between test runs.

Signed-off-by: Igor Ryzhov <iryzhov@nfware.com>

tests/topotests/ospf_suppress_fa/r2/ospfd.conf

@@ -10,6 +10,7 @@ interface r2-eth1
  ip ospf dead-interval 10
 !
 router ospf
+ ospf router-id 10.0.23.2
  network 10.0.12.0/24 area 0
  network 10.0.23.0/24 area 1
  area 1 nssa