go db: Change default database to use "dev" password (same as local)

Summary: Changes the default test fixture to use "dev" as the password
for databases.

ci/docker-compose.yml

@@ -8,6 +8,6 @@ services:
     ports:
       - "3307:3306"
     environment:
-      MYSQL_ROOT_PASSWORD: ""
+      MYSQL_ROOT_PASSWORD: "dev"
       MYSQL_ALLOW_EMPTY_PASSWORD: "yes"
 

internal/testfixtures/db.go

@@ -4,7 +4,6 @@ import (
 	"database/sql"
 	"fmt"
 	"math/rand"
-	"os"
 )
 
 type DBConfig struct {
@@ -20,17 +19,11 @@ func (d DBConfig) String() string {
 
 var DefaultDBConfig = DBConfig{
 	Username: "root",
-	Password: "",
+	Password: "dev",
 	Hostname: "localhost",
 	Port:     3307,
 }
 
-func init() {
-	if pw := os.Getenv("DB_PASSWORD"); pw != "" {
-		DefaultDBConfig.Password = pw
-	}
-}
-
 type TestDatabase struct {
 	DBName    string
 	ControlDB *sql.DB