Make sure that username cannot contain html characters. Also checks for username length limit of 128-characters long (it assumed it was 64-characters). Handles #496.
Merge pull request #498 from omaciel/github496

Make sure that username cannot contain html characters. Also checks for ...
Remove system with explicit yes-no confirmation
add system with all possible values and validate it via system facts/details
Merge pull request #499 from sghai/master

System-tests
Validation message for organizations label has changed.
Merge pull request #500 from omaciel/labelnamehasbeentaken

Validation message for organizations label has changed.