RTP: removed shutdownrestart example - lifecycle operations unsupported by RTP
IPvXTrafGen: fixed initialize

- call IPvXTrafSink::initialize(stage) in all stages
- read destaddresses at start of session instead initialize(3)
code style - indent
examples: BurstHost extends NodeBase  (fingerprint changed)
--code style: indent
--IPvXTrafGen: fixed packet sending
LifecycleController: fixed the name of time attribute
IPvXTrafGen: removed static member 'counter', changed the message name creation for sent message
UDPBasicApp: removed static member 'counter', changed the message name creation for sent message

merged createPacket() into sendPacket()
NodeStatus: throws runtime error when current state invalid for start the operation

replaced assert to runtime error
test: added an IPvXTrafGen lifecycle test
tests: fixed DHCP_2 test - removed elapsed time

elapsed time is measured real time