Use management profiles on NAV 5.0 and newer.

Because:

- NAV 5.0 drops SNMP attributes as part of the Netbox model, introducing
  the concept of management profiles. Kindnavsync needs to be able to
  work with both pre-5.0 and post 5.0-versions of NAV for now.

Support for older NAV versions can be dropped later.

bin/kindnavsync

@@ -5,6 +5,7 @@ Best-effort synkronisering mellom autoritative utstyrsdata i Kind og
 NAVs liste over hva som skal overvåkes.
 """
 import copy
+import functools
 import os
 import socket
 from collections import defaultdict
@@ -26,6 +27,15 @@ NAV_API_URL = "http://localhost/api/1"
 
 DEFAULT_SNMP_COMMUNITY = 'public'
 DEFAULT_SNMP_VERSION = '2'
+DEFAULT_MANAGEMENT_PROFILE = {
+    "name": "Uninett standard SNMP profile",
+    "protocol": "SNMP",
+    "configuration": {
+        "community": DEFAULT_SNMP_COMMUNITY,
+        "version": int(DEFAULT_SNMP_VERSION),
+        "write": False,
+    },
+}
 
 CATEGORY_MAP = {
     'lag 3 svitsj': 'GSW',
@@ -406,17 +416,27 @@ def insert_one_into_nav(nav_api, kind_device):
     There is no management or matching of serial numbers here - we rely on NAV
     to collect serial numbers via SNMP.
 
+    :type nav_api: kindnavsync.navapi.NAVAPI
     :type kind_device: KindDevice
 
     """
     netbox = NAVBox(
         sysname=kind_device.name, ip=kind_device.loopback,
-        read_only=DEFAULT_SNMP_COMMUNITY,
-        snmp_version=DEFAULT_SNMP_VERSION,
         roomid=kind_device.room,
         organizationid=DEFAULT_ORGANIZATION,
         categoryid=CATEGORY_MAP.get(kind_device.type, DEFAULT_CATEGORY),
     )
+    nav_version = nav_api.get_version()
+
+    if nav_version[0] >= 5:
+        # NAV >= 5 wants management profiles
+        profile = find_or_create_default_management_profile(nav_api)
+        netbox["profiles"] = [profile["id"]]
+    else:
+        # Old NAV versions needs SNMP attrs directly on netbox objects
+        netbox["read_only"] = DEFAULT_SNMP_COMMUNITY
+        netbox["snmp_version"] = DEFAULT_SNMP_VERSION
+
 
     try:
         nav_api.get_room(kind_device.room)
@@ -443,6 +463,29 @@ def insert_one_into_nav(nav_api, kind_device):
         raise
 
 
+@functools.lru_cache(1)
+def find_or_create_default_management_profile(nav_api):
+    """
+    :type nav_api: kindnavsync.navapi.NAVAPI
+    """
+    profiles = nav_api.list_management_profiles()
+    candidates = [p for p in profiles if _is_candidate_profile(p)]
+    if candidates:
+        return candidates[0]
+    else:
+        response = nav_api.post_management_profile(DEFAULT_MANAGEMENT_PROFILE)
+        return response.body
+
+
+def _is_candidate_profile(profile):
+    config = profile.get("configuration", {})
+    return (
+        profile.get("protocol") == "SNMP"
+        and config.get("version") == int(DEFAULT_SNMP_VERSION)
+        and config.get("community") == DEFAULT_SNMP_COMMUNITY
+    )
+
+
 def update_existing_in_nav(nav_api, kind_devices):
     LOG.debug("Sammenligner eksisterende utstyr i NAV med utstyr fra Kind")
     for device in kind_devices: