chore(jans-auth): Use wildcard instead of explicit list of jar files to extend AS classpath

[jgomer2001]

I'm refering to /opt/jans/jetty/jans-auth/webapps/jans-auth.xml

Having to edit this file every time a new jar is added is extra work for admins. They should just copy files to custom/lib and restart. I suggest to use:

<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE Configure PUBLIC "-//Jetty//Configure//EN" "http://www.eclipse.org/jetty/configure_9_0.dtd">
<Configure class="org.eclipse.jetty.webapp.WebAppContext">

    <Set name="contextPath">/jans-auth</Set>
    <Set name="war">
        <Property name="jetty.webapps" default="." />/jans-auth.war
    </Set>
    <Set name="extractWAR">true</Set>

<Set name="extraClasspath">./custom/libs/*</Set></Configure>