add json for isis_loopbacks
add json for isis_loopbacks

dhalperi/batfish,intentionet/batfish,arifogel/batfish,arifogel/batfish,intentionet/batfish,intentionet/batfish,batfish/batfish,arifogel/batfish,intentionet/batfish,batfish/batfish,batfish/batfish,intentionet/batfish,dhalperi/batfish,dhalperi/batfish