Delete all python tests.
Replaced new Date.getTime() calls with System.currentTimeMillis() for performance
Added unit tests for RequestTracer, improved reliability
B-58460 Added performance test for RequestTracer
B-58460 Changed long to double for precision, added comments
Merge pull request #771 from izrik/B-58740

B-58740 Delete all python tests.
Merge pull request #772 from dmnjohns/request-tracer-perf-tweak

B-58460 Request tracer perf tweak