Trace a block of code in Kamon with OpenTracing support

TraceCodeBlock.scala

def traceBlock[T](name: String, parentSpanContext: Option[SpanContext] = None)(f: => T): T = {
  val spanBuilder = Kamon.tracer.buildSpan(s"${getClass().getSimpleName}.$name")
  val newSpan = addDefaultTags(spanBuilder).asChildOf(parentSpanContext).start()
  val activatedSpan = Kamon.makeActive(newSpan)
  try {
    f
  } finally {
    activatedSpan.deactivate()
    newSpan.finish()
  }
}