Provides testing support for traces using molten-trace.
Extend com.hotels.molten.trace.test.AbstractTracingTest
to have support for testing tracing logic.
Use com.hotels.molten.trace.test.SpanMatcher
to simplify assertions against spans.
Also, see com.hotels.molten.trace.test.TracingTestSupport
for bringing up Brave/Zipkin based test infrastructure.