Adds/updates testing script

Closes #1 (closed)

scripts/loop_laxclient.sh

+#!/bin/bash
+
+
+if [ $# -ne 1 ]
+  then
+	  echo "usage: $0 interval"
+	  echo "   where interval is the number of seconds between two calls to the laxparing API"
+      echo "   example: $0 5"
+	  exit
+fi
+
+# infinite loop
+while :
+do
+	python3 test_mediator_laxparking.py
+	echo "Press [CTRL+C] to stop.."
+	sleep $1
+done