Add YMQ Tests

[magniloquency]

No description provided.

[gxuu]

I know this is a WIP here, just putting a few notes.

When it's done, all the testing code should be using gtest and reside in the parallel directory in /tests instead of the code directory. So something like PROJECT_DIR/tests/io/ymq/. The corresponding directory's cmake should be updated as well. This is because we don't package tests when releasing. Also test should be auto triggered when running ctest.

tests should be grouped to suite and cases. I'd say all the tests you've written as of now can be put in just one suite, and then later we will have nuance tests that involve the TCP protocol and that would better be put into another suite.

Changes to Bytes should not change it's behavior where the core uses it. Non-affecting changes are perfectly fine.

timestamp might be your friend, if you are dealing with itimerspec. It does easy conversion to itimerspec for you.