Remove chattiness from console log

[annuello]

Each SNMP trap received generates a [info] Received from entry in the NodeRED console, regardless of whether the event is an error or normal SNMP behaviour. In large deployments with lots of SNMP activity this chatter can render the console unusable/impractical. Please remove the node.log() [info] chattiness, or modify the node to make console logging optional for these business-as-usual SNMP messages.

Lines that I think are causing the excessive logging: 229, 260, 307.