[vnet_route_check] don't hardcode prefix length of /24 (#1756)

Signed-off-by: Stepan Blyschak <stepanb@nvidia.com>

scripts/vnet_route_check.py

@@ -186,7 +186,9 @@ def filter_out_vnet_ip2me_routes(vnet_routes):
  # rif_attrs[1] - IP prefix and prefix legth
  # IP2ME routes have '/32' prefix length so replace it and add to the list
  if rif_attrs[0] in vnet_intfs:
- vnet_ip2me_routes.append(rif_attrs[1].replace('/24', '/32'))
+ rif_ip, _ = rif_attrs[1].split('/')
+ ip2me_route = rif_ip + '/32'
+ vnet_ip2me_routes.append(ip2me_route)
 
  for vnet, vnet_attrs in vnet_routes.items():
  for route in vnet_attrs['routes']:
@@ -240,7 +242,7 @@ def get_vnet_routes_from_asic_db():
 
  vnet_vrfs = get_vrf_entries()
  vnet_vrfs_oids = [vnet_vrfs[k] for k in vnet_vrfs]
- 
+
  vnet_intfs = get_vnet_intfs()
 
  vrf_oid_to_vnet_map = {}