BasicManagement: Use rygel coding style

* Use 'this' to refer to object variables
* line length
* empty lines before break/return/etc.
BasicManagement: remove unused constants

Timeout and repeat_count make sense to be limited, but the address
and hostname string lengths not so much: The former depend on
input from UPnP client, the latter depend on nslookup output.
BasicManagement NSLookup: actually return additional_info