Port existing MQTT tests to new socket MQTT API. Signed-off-by: Robert Lubos <robert.lubos@nordicsemi.no>
moving tests/net/mqtt_* tests under tests/net/lib/ Change-Id: I966a6b303ad4d0fb467f277a4a7379b29fe40e98 Signed-off-by: Tomasz Bursztyka <tomasz.bursztyka@linux.intel.com>