Function usage

src/python/cli/src/mesos/cli.py:20–24

(message, parser)

# Helper for printing out a message and then the "usage" then exiting.
def usage(message, parser):
    import sys
    sys.stderr.write(message + '\n')
    parser.print_help()
    sys.exit(1)


# Helper for printing out a message and then exiting.