Group DN override does not work with "flat" naming

DN override seems to be incompatible with flat naming.

The provisioner forces this naming pattern on groups when flat is chosen...

grouper/src/grouper/edu/internet2/middleware/grouper/app/ldapProvisioning/LdapProvisioningTranslator.java,  ~ line 56
} else if (ldapSyncConfiguration.getGroupDnType() == LdapSyncGroupDnType.flat) {
dn = GrouperUtil.ldapEscapeRdn(groupRdnAttributeName + "=" + fieldValueString) + "," + ldapSyncConfiguration.getGroupSearchBaseDn();

}
...which results in group names like...
cn=cn\=my-test-group\,ou\=User Groups\,ou\=Groups\,dc\=umich\,dc\=edu,ou=ManagedGroups,ou=Groups,dc=umich,dc=edu
 

Based on the code in LdapProvisioningTranslator, I don't believe the issue can be worked around with the "proper" Group field name - translation expression