Issue #52: Re-raise exception instead of sys.exit immediately - fedpkg

fedpkg

#52 Re-raise exception instead of sys.exit immediately

Closed: Fixed Nov 21, 2016 Opened Oct 11, 2016 by cqi.

In fedpkg.cli.retire and fedpkg.cli.update, once exception occurs, fedpkg calls sys.exit to terminate immediately and __main__ has no chance to get the exception as others do. It's better re-raise the exception, and let __main__ controls how to terminate.