Updated setUpClass method with decorator and using alpha string for org name

Fix following two issues:

1. @classmethod decorator was missing so tests were failing with error:
TypeError: unbound method setUpClass() must be called with ActivationKey instance as first argument

2. org name should be alpha string otherwise tests were failed with this error,
UnicodeEncodeError: 'ascii' codec can't encode characters in position 0-24: ordinal not in range(128)