'Starts the specified subsystem.
Args:
subsystem [string]: The repository name of the subsystem to run.'

def start_subsystem(self, subsystem, environ=None):

    print 'Starting    {subsystem}'.format(subsystem=subsystem)
    command = os.path.join(self.installation.SUBSYSTEM_ROOT_DIR, subsystem, 'start_dev.sh')
    return self.run_daemon(command, [command], environ=environ)
