Commits on Nov 15, 2018

1. [AuthenticationMixin] authentication_status to virtual_delegate …

   Creates a virtual_delegate for AuthenticationMixin#authentication_status
   which allows it to be included in reports and put in as part of the main
   query.
   
   The biggest thing of note in this change is how the status_severity_arel
   is being used to handle the sorting properly in the SQL query.  It makes
   use of a SQL's case statement to handle what would normally be a
   `sort_by` on the hash lookup of Authentication::STATUS_SEVERITY.
   Instead, we match each key to the status column and use that as the
   value for the `ORDER BY exp DESC` in the `has_one`, which allows for the
   same affect.
   
   This also means that it can inject itself in the `SELECT` of a
   `MiqReport`, and avoid N+1's on things like quadicons and such for pages
   that use `MiqReport#paged_view_search`.

   

   NickLaMuro committed Nov 15, 2018
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