update client checks to match validation rules

public_html/appmonitor/index.php

@@ -362,7 +362,7 @@ $oMonitor->addCheck(
     [
         "name" => "plugin Load",
         "description" => "current load",
-        "parent" => false,
+        "parent" => null,
         "check" => [
             "function" => "Loadmeter",
             "params" => [
@@ -377,7 +377,7 @@ $oMonitor->addCheck(
     [
         "name" => "plugin ApacheProcesses",
         "description" => "Apache processes",
-        "parent" => false,
+        "parent" => null,
         "check" => [
             "function" => "ApacheProcesses",
             "params" => [