adds ssl to example code

connecting to AWS MQTT without TLS may not be possible

Author: jersu11

examples/aws_iot_shadows.py

@@ -141,6 +141,7 @@ def message(client, topic, msg):
 client = MQTT.MQTT(
     broker=secrets["broker"],
     client_id=secrets["client_id"],
+    is_ssl=True,
     socket_pool=pool,
     ssl_context=ssl_context,
 )

examples/aws_iot_simpletest.py

@@ -138,6 +138,7 @@ def message(client, topic, msg):
 client = MQTT.MQTT(
     broker=secrets["broker"],
     client_id=secrets["client_id"],
+    is_ssl=True,
     socket_pool=pool,
     ssl_context=ssl_context,
 )