[Feature] Add no_use_bulkwalkall as an option for discovered devices

[araddas]

We have a subset of devices on a specific subnet that do not play nicely with BULKWALK. We would like to add no_use_bulkwalkall: true to all discovered devices, manually defining this parameter per device will not scale within our environment. Ideally we would be able to define this in the discovery or global section, I'm not sure which section makes the most sense, but the following are some examples of how I think it should work.

Possible Discovery Example

discovery:
    cidrs:
        - 1.2.3.4/28
    ignore_list: []
    debug: false
    ports:
        - 161
    default_communities: []
    use_snmp_v1: false
    default_v3: aws.sm.my-secret-snmp-creds
    add_devices: true
    add_mibs: true
    threads: 4
    replace_devices: true
    check_all_ips: true
    kentik: null
    no_use_bulkwalkall: true

Possible Global Example

  global:
    poll_time_sec: 60
    drop_if_outside_poll: false
    mib_profile_dir: /etc/ktranslate/profiles
    mibs_db: /etc/ktranslate/mibs.db
    mibs_enabled: []
    timeout_ms: 20000
    retries: 0
    global_v3: null
    response_time: true
    ping_interval_sec: 60
    no_device_hardcoded_oids: false
    user_tags:
    jitter_time_sec: 0
    fast_poll: false
    watch_profile_changes: false
    save_mds_cache: false
    no_use_bulkwalkall: true

[i3149]

Easiest is to define in the discovery section for me. Then this value would get added to discovered devices as the are found. Would you want to further limit its application by subnet? EG, something like:

discovery:
    cidrs:
        - 1.2.3.4/28
    ignore_list: []
    debug: false
    ports:
        - 161
    default_communities: []
    use_snmp_v1: false
    default_v3: aws.sm.my-secret-snmp-creds
    add_devices: true
    add_mibs: true
    threads: 4
    replace_devices: true
    check_all_ips: true
    kentik: null
    no_use_bulkwalkall: 
      - 1.2.3.4/30

Or just keep as a boolean for now?

[araddas]

I think a boolean would be best for now.

[i3149]

This does the trick for me in my lab: #766

[i3149]

Merged in. Only trick I've found is that for devices where no_use_bulkwalkall is true when discovered and then if you subsequently set the disco config to false the device itself keeps no_use_bulkwalkall as true. Assuming this behavior is ok for you but let me know if its trouble.