port optparse to argparse in bundlebuilder.py

@dnarvaez I hope this one is done correctly

1. It uses normal parse rather than know_parse()
2. The code has been refactored by removing the args handling in cmd_*, all due to subparser in argparse :)

I have run, auotpep8 to the code.i don't have some dependencies for osbuild check..will do it later.
Thanks and Please review...