Run Java stress tests on GKE

Eradicate unused interarrival distributions

Improvements to java benchmark integration.

distributions since we don't use them and it's not sensible
to add them

Expand corpora, improve dictionary

Make RVM ruby accessible by performance tests

Add knob for default core output verbosity

Support Java performance worker in run_performance_tests.py

Run Go stress tests on GKE

Fixing op duplication in test.

PHP: ran php-cs-fixer again

Add RubyLanguage to benchmarking scenarios

Add a #include needed as everything moved to gpr_malloc

Add a dictionary for fuzzing

Factored out parse functions from sockaddr_resolver

Populate ScenarioResultSummary result in QPS driver.