Change-Id: Ie8877a9047c96030f138745a19768fcfa11da855 Refs: #4462
Change-Id: I075413f6dfa1183682c4432cf96a47323cc6c43a Refs: #3599
As a sample, this commit also includes a test suite for ndn::ping::client::StatisticsCollector class. refs #2795 Change-Id: Ia0c7522ae26bee1cc9d172c7379ab62f84325ed7