change to use Virtual table for Poller Performance report

Netdisco/lib/App/Netdisco/Web/Plugin/AdminTask/PollerPerformance.pm

@@ -13,26 +13,7 @@ register_admin_task({
 });
 
 ajax '/ajax/content/admin/performance' => require_role admin => sub {
-    my $set = schema('netdisco')->resultset('Admin')
-      ->search({
-        action => { -in => [qw/discover macsuck arpnip/] },
-      }, {
-        columns => [
-          'action', 'entered',
-          { entered_stamp => \"to_char(entered, 'YYYY-MM-DD HH24:MI:SS')" },
-        ],
-        select => [
-          { count => 'device', -as => 'number' },
-          { min => 'started',  -as => 'start' },
-          { max => 'finished', -as => 'end' },
-          \"justify_interval(extract(epoch from (max(finished) - min(started))) * interval '1 second') AS elapsed",
-        ],
-        as => [qw/ number start end elapsed /],
-        group_by => [qw/ action entered /],
-        having => \'count(device) > 1',
-        order_by => { -desc => [qw/ entered elapsed /] },
-        rows => 50,
-      });
+    my $set = schema('netdisco')->resultset('Virtual::PollerPerformance');
 
     content_type('text/html');
     template 'ajax/admintask/performance.tt', {