LACP upgrade - 4: updated LACP member port detach handler

Updated #member-port #detach #handler in #LACP module. This handler #detaches the #port from the #hardware #aggregator and #inform the #remote #peer of the same. After this a wait timer is set for later processing. This procedure is executed as part of #protocol #state #changes or as a side effect of a management operation. The aggregator is detached from the member-port in hardware and the peer is informed that local end is not in sync anymore. The #collection and #distribution procedures are #disabled in #hardware and the peer will be known of the same when it receives the updated LACP PDU from local end.

#LACP update 17 ...
[commit 246b3ed5760ddcf5cf0765586213084eff6fd177] (https://github.com/nes-repo/NES-Open-Switch/commit/246b3ed5760ddcf5cf0765586213084eff6fd177)