METRON-764 DST bug in metron-profiler-client Unit Tests

[mattf-apache]

This is a Unit Test bug. Please see https://issues.apache.org/jira/browse/METRON-764 for detailed description and how to reproduce the problem.

I only changed a Unit Test file and a docs file, therefore I only tested Unit Tests, which pass as shown by Travis. I also re-ran the reproduction manually and showed it no longer happens with the fix.

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[cestella]

+1, great catch @mattf-horton !