Kafka tests (#944)

A simple test for Kafka integration which runs locally provided cluster has Kafka and Fission install has Kafka integratiom enabled (mqtrigger-kafka deployment present).

test/tests/mqtrigger/kafka/hellokafka.js

@@ -0,0 +1,9 @@
+
+module.exports = async function (context) {
+    console.log(context.request.body);
+    let obj = context.request.body;
+    return {
+        status: 200,
+        body: obj
+    };
+}