[FINE] Prefer rr.report over rr.report_results in SavedReportPagi…

…ng mixin

https://bugzilla.redhat.com/show_bug.cgi?id=1594387

Gaprindashvili Backport commit from:

    #4143

Original SHA:

   b5260fd

Rest of original message below...

* * *

This not only makes it so we are consistent between the main controller
and the mixin, but this is also much faster to use this over
`MiqReportResult#report_results` when there is a large `binary_blob`
associated with the `MiqReportResult` record.

app/controllers/application_controller.rb

@@ -297,7 +297,7 @@ def saved_report_paging
     @sb[:pages][:perpage] = settings(:perpage, :reports)
 
     rr = MiqReportResult.find(@sb[:pages][:rr_id])
-    @html = report_build_html_table(rr.report_results,
+    @html = report_build_html_table(rr.report,
                                     rr.html_rows(:page     => @sb[:pages][:current],
                                                  :per_page => @sb[:pages][:perpage]).join)