(via ahh@google.com)
Under some configurations gRPC includes google3 base headers.  google3
has a namespace "thread" which mixes poorly with unqualified use of the
type std::thread; adding that namespace to various google3 headers
breaks this test.

refacto of the reconnect tcp server to a general purpose test tcp server to be reused by the set_initial_string_test

Make payloads respect the new defaults

Enable reasonable default if resp size not specified

Have not yet added tests with security support, coming soon

client