Support SAI_QUEUE_ATTR_TYPE on vs platform simulating MLNX2700 (sonic-net#1459)

Signed-off-by: Stephen Sun <stephens@nvidia.com>

Author: stephenxs

vslib/SwitchMLNX2700.cpp

@@ -41,16 +41,18 @@ sai_status_t SwitchMLNX2700::create_qos_queues_per_port(
     {
         sai_object_id_t queue_id;
 
-        sai_attribute_t attr[2];
+        sai_attribute_t attr[3];
 
         attr[0].id = SAI_QUEUE_ATTR_INDEX;
         attr[0].value.u8 = (uint8_t)i;
         attr[1].id = SAI_QUEUE_ATTR_PORT;
         attr[1].value.oid = port_id;
+        attr[2].id = SAI_QUEUE_ATTR_TYPE;
+        attr[2].value.s32 = (i < port_qos_queues_count / 2) ?  SAI_QUEUE_TYPE_UNICAST : SAI_QUEUE_TYPE_MULTICAST;
 
         // TODO add type
 
-        CHECK_STATUS(create(SAI_OBJECT_TYPE_QUEUE, &queue_id, m_switch_id, 2, attr));
+        CHECK_STATUS(create(SAI_OBJECT_TYPE_QUEUE, &queue_id, m_switch_id, 3, attr));
 
         queues.push_back(queue_id);
     }