Use DSN to configure database

backup-manager/symfony/2.1/config/packages/backup_manager.yaml

@@ -2,12 +2,7 @@
 bm_backup_manager:
     database:
         development:
-            type: mysql
-            host: '%env(BM_HOST)%'
-            port: 3306
-            user: '%env(BM_USER)%'
-            pass: '%env(BM_PASS)%'
-            database: '%env(BM_DATABASE)%'
+            dsn: '%env(mysql://db_user:db_password@127.0.0.1:3306/db_name)%'
     storage:
         local:
             type: Local

backup-manager/symfony/2.1/manifest.json

@@ -6,9 +6,6 @@
         "config/": "%CONFIG_DIR%/"
     },
     "env": {
-        "BM_HOST": "localhost",
-        "BM_USER": "root",
-        "BM_PASS": "",
-        "BM_DATABASE": "symfony"
+        "DATABASE_URL": "mysql://db_user:db_password@127.0.0.1:3306/db_name"
     }
 }