ipvxtrafgen lifecycle test - changed module positions in NED
MACBase: registerInterface is not virtual: do not override
module tests: added EtherHost lifecycle test
MACRelayUnitPP: added timer pointer to PortBuffer

stores all self message pointer
MACRelayUnit: added liifecycle support
EtherSwitch: added lifecycle support
EtherHost: changed submodule positions
EtherHost lifecycle test: added switch on/off, modified timings