zebra: print rmac nexthop list

zebra: print rmac nexthop list

Ticket:#2798406
Reviewed By:
Testing Done:

Before change:
--------------

TORS1# show evpn rmac vni 4001 mac  44:38:39:ff:ff:01
MAC: 44:38:39:ff:ff:01
 Remote VTEP: 36.0.0.11
 Refcount: 1
  Prefixes:
    [1]:[00:00:00:00:00:00:00:00:00:00]:[::]/352
TORS1#
TORS1# show evpn rmac vni 4001 mac 44:38:39:ff:ff:01 json
{
  "routerMac":"44:38:39:ff:ff:01",
  "vtepIp":"36.0.0.11",
  "refCount":1,
  "localSequence":0,
  "remoteSequence":0,
  "prefixList":[
    "[1]:[00:00:00:00:00:00:00:00:00:00]:[::]\/352"
  ]
}

After change:
-------------

TORS1# show evpn rmac vni 4001 mac 44:38:39:ff:ff:01
MAC: 44:38:39:ff:ff:01
 Remote VTEP: 36.0.0.11
 Refcount: 0
  Prefixes:
TORS1#
TORS1# show evpn rmac vni 4001 mac 44:38:39:ff:ff:01 json
{
  "routerMac":"44:38:39:ff:ff:01",
  "vtepIp":"36.0.0.11",
  "nexthops":[
    "36.0.0.11"
  ]
}

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