metal-core is contantly adding VLAN interfaces if VTEP config is missing in SONiC

[iljarotar]

If the following config is missing in SONiC, metal-core keeps adding new VLAN interfaces until the maximum of 1000 is reached and then starts reporting failure.

{
  "VXLAN_EVPN_NVO": {
    "nvo": {
      "source_vtep": "vtep"
    }
  },
  "VXLAN_TUNNEL": {
    "vtep": {
      "src_ip": "10.7.7.7"
    }
  },
}