LP1904233 Improve logger controls sans configs

LP1904233 Improve logger controls sans configs

Allow Perl client to specify log level and STDOUT logging when the
$logger is instantiated without any configuration information, i.e. the
client is not connecting to the OpenSRF network.

$logger->set_log_stdout(1);
$logger->set_log_level($logger->INFO);

Signed-off-by: Bill Erickson <berickxx@gmail.com>