Fix Inform with empty ConnectionRequestURL value
Background: Bug reported from customer: https://project.iopsys.eu/issues/15140
The Inform message could include the empty ConnectionRequestURL value when cwmp_get_parameter_value fails.
Background: Bug reported from customer: https://project.iopsys.eu/issues/15140
The Inform message could include the empty ConnectionRequestURL value when cwmp_get_parameter_value fails.