Use postgres 9.4 in travis
Use postgres 9.4 in travis

lackac/horizon,irisli/horizon,irisli/horizon,irisli/horizon,masonforest/go-horizon,masonforest/horizon,stellar/horizon,nullstyle/go-horizon,masonforest/horizon,FredericHeem/go-horizon,masonforest/horizon,stellar/horizon,FredericHeem/go-horizon,stellar/horizon,FredericHeem/go-horizon,masonforest/go-horizon,nullstyle/go-horizon,masonforest/go-horizon,lackac/horizon,nullstyle/go-horizon,lackac/horizon