MSTP update - 8: optimizing MSTP framework

Added #optimization s in #MSTP module. This #remove s #unused #variable s and #reduce s the size of certain #large #parameter s #with their #smaller #counterpart s. This brings down the overall memory requirement of the MSTP module.

#802-1S #MSTP update 8 ...
[commit 400670d3efe29958588acb49c1a941d2b1eb704a]