Audit log 'Configuration' entries are not written when using external configuration store

Steps to reproduce.

1. Install OpenAM with an external configuration store.
https://backstage.forgerock.com/docs/openam/13.5/install-guide#prepare-configuration-store

2. Create a new realm while watching logs/config.csv. Nothing is written.

Expected result:
If using embedded configuration, config.csv will have entries such as:

==> config.csv <==
"979d97bf-f670-4b10-b6da-4130bd1e4683-2135","2017-01-26T16:38:13.966Z","AM-CONFIG-CHANGE","979d97bf-f670-4b10-b6da-4130bd1e4683-2133",,,"id=amadmin,ou=user,dc=openam,dc=forgerock,dc=org","o=newrealm1,ou=services,dc=openam,dc=forgerock,dc=org","CREATE",,,,,,"/newrealm1"

The reason appears to be that com.sun.identity.sm.ldap.SMSEmbeddedLdapObject uses the audit framework, while com.sun.identity.sm.ldap.SMSLdapObject does not.