Bridge CoS update - 8

Added changes in ethernet module for traversing #port #level #effective ( #remapped ) #CoS to #traffic-class #mapping configuration. The new changes enables to #traverse through the optimized configuration entries. The #agent #framework uses these for #GETNEXT functionality among the configuration entries.

#Ethernet update 80 ...
[commit dfbd4317ba1dc11718a32227cd76925e799a200a]