Fixes #21036 - Don't use class as class_name in associations

Fixes #20957 - Replace alias_method_chain with Module prepend

Deprecated in Rails 5.0 and will be removed in 5.1. Some instances of
classes overwriting existing methods can be handled with `super`, other
concerns or modules are changed to use prepend instead of include....

Fixes #20905 - Add message in audit in case no changes

Fixes #20705 - display paginations on audits page correctly

Fixes #20665 - make smart proxy delete button grey

fixes #20878 - vmware clone: rewrite boot order

Fixes #20890 - changes SSH key validation messages

Fixes #20952 - Replace AC::Parameters Hash methods

Replaces any methods that used to be from Hash with the more limited
ActionController::Parameters API.

Fixes #21024 - Reorder AR associations in order of use

Fixes #20783 - Move Inline messaging regarding user saving first

within "Notification" fieldset