couple of test fixes after upgrading to a newer mocha/shoulda

fixes parameters whitespace validations

fixes #1716 - remove whitespace from hostname

fixes #1463 - let Foreman run on a sub path

e.g. for it being available on http://localhost:3000/foreman you run:

RAILS_RELATIVE_URL_ROOT=/foreman rails s

fixed wrong test - refs #1677

disk layout should really not be unique.

fixes #1638 - remove whitespaces for user email instead of validation error

minor fix and added a few tests to ensure config templates works correctly

fixes #1700 audit page performance improved

• Added auditabale name and associated name columns.
• Added username to audit table

fixes #1613 - Email address format validation preventing admin user creation