Boundary tests for templates

- Updated all existing tests with factory
- Added support to create template with audit comments
- Added 7 new boundary tests
thank you for merging this. I retested it by changing the locale too and test is working fine. The error message is not translated. Reason, this error message is part of our automation code not the product code.
https://github.com/omaciel/robottelo/blob/master/robottelo/ui/template.py#L57-to-#L58