Fix infra address in migration 16

Author: cpacia

repo/migrations/Migration016.go

@@ -84,7 +84,7 @@ func migration016DefaultWalletConfig() *Migration016WalletsConfig {
 		},
 		ETH: &migration016CoinConfig{
 			Type:             "API",
-			APIPool:          []string{"https://rinkeby.infura.io"},
+			APIPool:          []string{"https://mainnet.infura.io"},
 			APITestnetPool:   []string{"https://rinkeby.infura.io"},
 			FeeAPI:           "", // intentionally blank
 			LowFeeDefault:    7,

repo/migrations/Migration016_test.go

@@ -207,7 +207,7 @@ func TestMigration016(t *testing.T) {
 
 	var re = regexp.MustCompile(`\s`)
 	if re.ReplaceAllString(string(configBytes), "") != re.ReplaceAllString(string(postMigration016Config), "") {
-		t.Logf("actual: %s", re.ReplaceAllString(string(configBytes), ""))
+		t.Logf("actual: %s, expected %s", re.ReplaceAllString(string(configBytes), ""), re.ReplaceAllString(string(postMigration016Config), ""))
 		t.Fatal("incorrect post-migration config")
 	}