[XRM Server/Unit Tests] Enhancement - SSH_DEPRECATED LIBSSH_API

[M-griffin]

[XRM Server/Unit Tests] Enhancement - SSH_DEPRECATED LIBSSH_API
Update Needed
The previous versions of libssh has functional API calls you'd make directly is now deprecated. So we must upgrade to the new methods.

Later versions of libssh replaced the functionality with an Async / Event type of flow.
Need to research the best way to rewrite the existing Socket / Communications abstraction to see I can still maps the read/writes.