[Nagios] SNMP Probe: reformated code.
[Nagios] SNMP Probe: reformated code.

- Do not pass OIDs using **kwargs. Use a dict instead in __SNMPQuery and related methods (get, getnext, table).
- Renamed "with_index" __SNMPQuery and related methods (get, netnext, table) attribute to "show_index".

bigbrozer/monitoring.nagios,bigbrozer/monitoring.nagios