XIVY-16062 Remove serenity usage

Author: ivy-lli

ivy-custom-errorpage/error-404.xhtml

@@ -6,14 +6,14 @@
       xmlns:p="http://primefaces.org/ui">
 
     <h:head>
-        <f:attribute name="primefaces.THEME" value="serenity-ivy" />
+        <f:attribute name="primefaces.THEME" value="freya-ivy-light" />
         <f:facet name="first">
             <meta http-equiv="X-UA-Compatible" content="IE=edge" />
             <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
             <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0"/>
             <meta name="apple-mobile-web-app-capable" content="yes" />
         </f:facet>
-        <title>PrimeFaces Serenity - Not Found</title>
+        <title>PrimeFaces Freya - Not Found</title>
     </h:head>
 
     <h:body styleClass="exception-body notfound">
@@ -45,7 +45,7 @@
             }
         </style>
 
-        <h:outputStylesheet name="css/layout-ivy.css" library="serenity-layout" />
+        <h:outputStylesheet name="css/layout-ivy-light.css" library="freya-layout" />
     </h:body>
 
 </html>