Bridge CoS update - 9

Added changes in ethernet module for traversing #port #level #CoS #remapping 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 81 ...
[commit 59c6924795664ff8cdda4a2b4c0cec202a1ce2a7]