removed batfish_tests function from tools/common.sh
removed batfish_tests function from tools/common.sh

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