The value of the object tlsMldSnpgCfgMvrPolicy specifies
the policy statement that is applied to decide whether or not
a multicast group learned on a SAP with the object
sapMldSnpgCfgMvrFromVplsId set to this Tls, can be joined to this Tls.
If an empty string is provided, all groups learned on these SAPs
are joined without applying a policy.