fixed issue 4691

[CavidM]

Fixed this issue (link)

[pleerock]

Don't think it's a right approach but we can merge it for now. This would definitely fail again if we do not attach tests for this issue.

[cajames]

@CavidM @pleerock This seems to cause an error for connection configs with replication. Please note the lack of the database property on the root object.

Example config:

{
  type: "mysql",
  replication: {
    master: {
      host: "DB_HOST",
      port: "DB_PORT",
      username: "DB_USER",
      password: "DB_PASSWORD",
      database: "DB_NAME"
    },
    slaves: [
      {
        host: "RO_DB_HOST",
        port: "DB_PORT",
        username: "DB_USER",
        password: "DB_PASSWORD",
        database: "DB_NAME"
      }
    ]
  },
  entities: [...]
};