Driver handling for command-specific 'not enabled' responses (e.g., CDP)

NetBrain's discovery and benchmark drivers for certain platforms, including Cisco Nexus, ASR, and IOS Switch, can treat expected informational responses, such as messages indicating a feature like CDP is not enabled, as invalid or failed command output rather than a valid result. This enhancement would update the affected drivers to recognize these known response patterns as valid, non-error output, allowing discovery and benchmark tasks to complete without unnecessary failures. Customers operating devices where certain features are intentionally disabled would benefit from more accurate task results and fewer false error indications during discovery and benchmarking.