LAG update - 6: optimizing standard aggregator parameter entries

Added #time #clock information in LAG module. On configuration changes the timestamps are internally logged for reference. This is useful to #log #last #modification on data-structures. Removed redundant data-structures from the module. Added new indexing for aggregator ports. This removes dependency on the augmented data-structures.

#LAG update 14 ...
[commit 2c1bdea2d804e0121514bd0d15e5b98343490c12] (https://github.com/nes-repo/NES-Open-Switch/commit/2c1bdea2d804e0121514bd0d15e5b98343490c12)