Not set <required> propertis on database password form

Many developer installation not use database password.

  $form['database']['bugbits_db_password'] = array(
    '#type' => 'textfield',
  	'#size' => 15,
//   '#required' => TRUE, // <<<<<<<
  	'#title' => t('Database password for mantis database'), 
  	'#default_value' => variable_get('bugbits_db_password', ''),
  	'#description' => t('Give the password for the database in which the mantis tables are stored here.')
  );