backwards compatibility fixes

[dhuseby]

This PR adds backwards compatiblity to the transport interop tests while preserving most of the optimizations made in the refactor. This adds the following:

• Implementations using the old interface are marked with "legacy: true" to signal that it uses lower case environment variables, does not isolate Redis keys, and outputs JSON results.
• Adds a tiny Redis proxy whenever the dialer or listener is "legacy: true". The Redis proxy takes the TEST_KEY and translates the Redis key from the legacy implementation into a properly isolated Redis key and request to the global Redis server

The net effect is that the only failing tests are due to upstream bugs. There are 13 different upstream bugs that cause test failures.

Signed-off-by: Dave Grantham dwg@linuxprogrammer.org

[dhuseby]

@seetadev @acul71 this is ready to go. 63 tests are failing but they are all related to the upstream bugs in implementations.

[seetadev]

@seetadev @acul71 this is ready to go. 63 tests are failing but they are all related to the upstream bugs in implementations.

@dhuseby : Hi Dave. Thank you for sharing. Appreciate it.

@acul71 : Lets catch up today or tomorrow morning and arrive at a workplan on these 63 tests that are failing. We can report them to the maintainers of the respective implementations to coordinate with us to arrive at a good conclusion on these issues.