//perhaps should keep reporter per instance...
ParticipantHealthReportCollectorImpl reporter =
new ParticipantHealthReportCollectorImpl(manager, instance);
MockEspressoHealthReportProvider provider = new
MockEspressoHealthReportProvider();
reporter.addHealthReportProvider(provider);
String statName = "latency";
//using constant as timestamp so that when each partition does this transition,
//they do not advance timestamp, and no stats double-counted
String timestamp = "12345";
provider.setStat(_dbName, statName,"15", timestamp);