6.5.2 docs for SAML v1.x configuration require update for generation of site id

Bug description

Attempting to follow https://backstage.forgerock.com/docs/am/6.5/saml1-guide/#saml-1-own-site-id results in a NoClassDefFoundError for com/sun/identity/shared/encode/Base64

How to reproduce the issue

1. Deploy an AM server, embedded config and user store.
2. user the following command from the above document: e.g.: 
   java -cp forgerock-util-24.0.8.jar:openam-shared-6.5.2.jar:openam-federation-library-6.5.2.jar com.sun.identity.saml.common.SAMLSiteID http://idp.amtest2.com:9080/access

Expected behaviour

A site ID value is returned.

Current behaviour

Exception in thread "main" java.lang.NoClassDefFoundError: com/sun/identity/shared/encode/Base64
	at com.sun.identity.saml.common.SAMLSiteID.generateSourceID(SAMLSiteID.java:99)
	at com.sun.identity.saml.common.SAMLSiteID.main(SAMLSiteID.java:119)
Caused by: java.lang.ClassNotFoundException: com.sun.identity.shared.encode.Base64
	at java.net.URLClassLoader.findClass(URLClassLoader.java:382)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
	... 2 more

Work around

Command needs to include openam-keystore jar, e.g.: 

java -cp forgerock-util-24.0.8.jar:openam-shared-6.5.2.jar:openam-federation-library-6.5.2.jar:openam-keystore-6.5.2.jar com.sun.identity.saml.common.SAMLSiteID http://idp.amtest2.com:9080/access