[SNMP] enhancing configuration file (#3381)
[SNMP] enhancing configuration file (#3381)

* enhancing configuration file

* Apply suggestions from code review

* wording update

DataDog/integrations-core,DataDog/integrations-core,DataDog/integrations-core,DataDog/integrations-core,DataDog/integrations-core,DataDog/integrations-core,DataDog/integrations-core,DataDog/integrations-core,DataDog/integrations-core,DataDog/integrations-core