Add SSL Unit Tests

This adds a test for very basic SSL functionality; just to ensure we're
not DOA for each change we do.

Like the other core socket tests, this test actually constructs an
isolated server using OpenSSL's BSDeque I/O methods.

Change-Id: I1e7ad8bcffd59ef8479716188fb3a987aadc383e
Reviewed-on: http://review.couchbase.org/43200
Tested-by: Mark Nunberg <mnunberg@haskalah.org>
Reviewed-by: Brett Lawson <brett19@gmail.com>