Add Supplier Exporter sample

spring-cloud-function-samples/function-sample-supplier-exporter/verify.sh

@@ -0,0 +1,13 @@
+#!/usr/bin/env bash
+
+curl -s localhost:8000/add -d '{"name":"world"}' -H "Content-Type: text/plain"
+echo
+echo Waiting...
+sleep 1
+RESPONSE=`curl -s localhost:8000/take`
+echo Got response: $RESPONSE
+if [[ "$RESPONSE" == '{"name":"hi world!"}' ]]; then
+  exit 0
+else
+  exit 1
+fi