fix(tests): Don't assume local Postgres is accessible over Unix socket
fix(tests): Don't assume local Postgres is accessible over Unix socket

This should be no change in behavior for anyone that does use a unix
socket, since it should also be bound to 127.0.0.1. But for those of us
that do not have a unix socket, it should make tests actually work.

mvaled/sentry,beeftornado/sentry,looker/sentry,mvaled/sentry,mvaled/sentry,mvaled/sentry,ifduyue/sentry,ifduyue/sentry,looker/sentry,ifduyue/sentry,mvaled/sentry,beeftornado/sentry,ifduyue/sentry,looker/sentry,looker/sentry,looker/sentry,mvaled/sentry,ifduyue/sentry,beeftornado/sentry