Add client test file

tests/client/__init__.py

@@ -0,0 +1 @@
+__author__ = 'nico'

tests/client/test_client.py

@@ -0,0 +1,7 @@
+import logging
+from hbmqtt.client._client import MQTTClient
+
+if __name__ == '__main__':
+    logging.basicConfig(level=logging.DEBUG)
+    C=MQTTClient()
+    C.connect(uri='mqtt://localhost:1883/', username='testuser', password="passwd")