regress: make sure python-template is valid python

previously the template used @dirport@ as an integer, which is
considered a parser error. We now wrap the value with int("@dirport@")
which will make sure the template is valid python code and will throw a
runtime-error during conversion instead of a parser error it @dirport@
is replaced with anything that is not an integer.

regress/configs/python-bareos-connection-test/python-bareos-test.py.in

@@ -21,5 +21,5 @@ import bareos.bsock
 
 password = bareos.bsock.Password("bareos")
 directorconsole = bareos.bsock.DirectorConsole(
-    address="@hostname@", port=@dirport@, password=password
+    address="@hostname@", port=int("@dirport@"), password=password
 )