Python init template update (#3478)

* Updated the template versions.

* Makes sure we use "where" in the system dir.

* Different solution.

* Increased the timeout

* Python init template update

Author: khkh-ms

src/Azure.Functions.Cli/StaticResources/function_app.py.template

@@ -1,4 +1,6 @@
 import azure.functions as func
+import datetime
+import json
 import logging
 
 app = func.FunctionApp()