Removing {{site.*}} leftovers
{{site.*}} is used in the appbuilder docs to refer to the product name variables
Merge pull request #483 from Icenium/fix-leftover-vars-in-abignore

Removing {{site.*}} leftovers
Add tests for -- arguments

Add tests for null value, undefined value, number and NaN.
PR Comments - remove test

Remove test which checks if string value with spaces is rejected from yargs arguments. The reasons is the change in the validation.