[Enhancement] More graceful "Username or Password is incorrect" error.

[rougegoat]

I recently changed my password, but forgot to update jss_helper's plist. As a result, instead of seeing something like

$ jss_helper --ssl promote
error: bad username and/or password

I saw something like

$ jss_helper --ssl promote
Traceback (most recent call last):
  File "/usr/local/bin/jss_helper", line 107, in <module>
    main()
  File "/usr/local/bin/jss_helper", line 100, in main
    args.func(args)
  File "/usr/local/bin/jss_helper_lib/actions.py", line 541, in promote
    all_packages = jss_connection.Package()
  File "/Library/Python/2.7/site-packages/python_jss-1.4.0-py2.7.egg/jss/jamf_software_server.py", line 589, in Package
    return self.factory.get_object(jssobjects.Package, data)
  File "/Library/Python/2.7/site-packages/python_jss-1.4.0-py2.7.egg/jss/jamf_software_server.py", line 734, in get_object
    return self.get_list(obj_class, data, subset)
  File "/Library/Python/2.7/site-packages/python_jss-1.4.0-py2.7.egg/jss/jamf_software_server.py", line 760, in get_list
    result = self.jss.get(url)
  File "/Library/Python/2.7/site-packages/python_jss-1.4.0-py2.7.egg/jss/jamf_software_server.py", line 202, in get
    error_handler(JSSGetError, response)
  File "/Library/Python/2.7/site-packages/python_jss-1.4.0-py2.7.egg/jss/tools.py", line 87, in error_handler
    raise exception

At a glance, there's no clear way to see that this is an error caused by a bad password. Is there any way to make this a bit easier to read at a glance?

Definitely low priority enhancement at best.

[sheagcraig]

Good plan. I've written some helper code for setting up preferences for python-jss, so I'll add that add in as well.