Port QoS feature from GAIL branch 10_4_0_112_gail branch to 10_7 special branch (10_7_2_14_qos) for GAIL customer

AN#show qos session ?

config              Show configurations of QoS Session

count               Show Session Count
AN(config)#qos ?     

disable             Deactivate QoS interface

enable              Activate QoS interface

filter              Configure QoS L4 filter

interface           Configure QoS interface

queue               Configure QoS queue

session             Configure QoS Session
AN(config)#qos 
AN(config)#qos session ?

add                 Add QoS Session Configuration

off                 Deactivate QoS Session

on                  Activate QoS Session