monitoring: Rename $host_name to $hostName in the servicegrid view script

refs #9538

modules/monitoring/application/views/scripts/list/servicegrid.phtml

@@ -23,7 +23,7 @@ if (count($pivotData) === 0) {
 $hostFilter = '(host_name=' . implode('|host_name=', array_keys($pivotData)) . ')';
 ?>
   <table class="pivot servicestates">
-<?php foreach ($pivotData as $host_name => $serviceStates): ?>
+<?php foreach ($pivotData as $hostName => $serviceStates): ?>
 <?php if (!$hasHeader): ?>
     <thead>
       <tr>
@@ -66,10 +66,10 @@ foreach ($serviceDescriptions as $service_description): ?>
       <tr>
         <th>
           <?= $this->qlink(
-            $host_name,
+            $hostName,
             'monitoring/list/services?' . $serviceFilter,
-            array('host' => $host_name),
-            array('title' => sprintf($this->translate('List all reported services on host %s'), $host_name))
+            array('host' => $hostName),
+            array('title' => sprintf($this->translate('List all reported services on host %s'), $hostName))
           ); ?>
         </th>
 <?php foreach (array_values($serviceStates) as $service): ?>