[#1207] Simplify tests around Listing proto use of allow_alias
[#1207] Simplify tests around Listing proto use of allow_alias

gubatron/openbazaar-go,OpenBazaar/openbazaar-go,OpenBazaar/openbazaar-go,gubatron/openbazaar-go,OpenBazaar/openbazaar-go,gubatron/openbazaar-go