Resolve CMocka Linking Issues

[bonedaddy]

Right now because all test source files are bundled with the source files building the libraries ends up including cmocka dependencies. The proper solution will be to place the test files in a tests directory that way they wont be including when we build the individual libraries. Also for example the peerstore libraries the main libpeerstore target requires linking to the testutils library for the same reason.

This isn't super important right now, but should definitely be done for the MVP release