Better logging for AdminTool and ipa-ldap-updater
- Automatically add a "Logging and output options" group with the --quiet,
--verbose, --log-file options.
- Set up logging based on these options; details are in the setup_logging
docstring and in the design document.
- Don't bind log methods as individual methods of the class. This means one
less linter exception.
- Make the help for command line options consistent with optparse's --help and
--version options.
Design document: http://freeipa.org/page/V3/Logging_and_output