The value of tmnxWlanGwSoftGreIfShapeMultiUe specifies
conditional egress shaping.
If the value of tmnxWlanGwSoftGreIfShapeMultiUe is equal to 'true',
egress shaping is only enabled for a Soft GRE tunnel while there are
multiple UE (User Equipment) using it.
If the value of tmnxWlanGwSoftGreIfShapeMultiUe is equal to 'false',
egress shaping is always enabled for every Soft GRE tunnel,
also while there is only a single UE using it.