* interop-testing: modify the stress test client to accept the same --use_tls, --use_test_ca, and --server_host_override arguments as the interop client.
Clarify usage of --use_test_ca=true for stress and interop clients.
Resolves#1756
The thread-unsafe method `io.grpc.testing.TestUtils.pickUnusedPort` causes flakes (#1756) in windows. Need to avoid use of this method in test as in windows the tests are running in different jvms and concurrent calls of this method in multiple processes tend to return the same port number.
There are some usages of this method in benchmarks, so moved the method to `io.grpc.benchmarks.Utils` and the method will only be used in benchmarks and not in test.
As of the discussion in #1584, the client does not
support TLS and interop tests that require auth are
yet to be implemented.
It has the same functionality as the C++ stress test client.
Eric Anderson