Set the state of the job to 'submitted'.
string $message: (optional) The log message to be saved along with the state change.
array $variables: (optional) An array of variables to replace in the message on display.
string $type: (optional) The message type.
\Drupal\tmgmt\JobInterface The job entity.
public function submitted($message = NULL, $variables = array(), $type = 'status');