interest/tlv: Do not encode InterestLifetime if it has default value (4sec)
interest/tlv: Do not encode InterestLifetime if it has default value (4sec)

Change-Id: I33dc7b7512e406655fe18c5e570bc69ad8d93298

cawka/packaging-ndn-cpp-dev,cawka/packaging-ndn-cpp-dev,cawka/packaging-ndn-cpp-dev,cawka/packaging-ndn-cpp-dev