Fix nxos_facts for nxapi transport (#23302)

* Partial revert of 2e476e64cd

This broke handling of nxos_facts over nxapi

* Fix nxos_facts tests not run in isolation

(cherry picked from commit d890167575)

lib/ansible/modules/network/nxos/nxos_facts.py

@@ -218,7 +218,6 @@ class FactsBase(object):
             yield self.transform_dict(item, keymap)
 
 
-
 class Default(FactsBase):
 
     VERSION_MAP = frozenset([
@@ -315,6 +314,8 @@ class Interfaces(FactsBase):
         return interfaces
 
     def populate_neighbors(self, data):
+        objects = dict()
+        if isinstance(data, str):
             # if there are no neighbors the show command returns
             # ERROR: No neighbour information
             if data.startswith('ERROR'):
@@ -323,8 +324,6 @@ class Interfaces(FactsBase):
             lines = data.split('\n')
             regex = re.compile('(\S+)\s+(\S+)\s+\d+\s+\w+\s+(\S+)')
 
-        objects = dict()
-
             for item in data.split('\n')[4:-1]:
                 match = regex.match(item)
                 if match:
@@ -332,6 +331,21 @@ class Interfaces(FactsBase):
                     if match.group(2) not in objects:
                         objects[match.group(2)] = []
                     objects[match.group(2)].append(nbor)
+
+        elif isinstance(data, dict):
+            data = data['TABLE_nbor']['ROW_nbor']
+            if isinstance(data, dict):
+                data = [data]
+
+            for item in data:
+                local_intf = item['l_port_id']
+                if local_intf not in objects:
+                    objects[local_intf] = list()
+                nbor = dict()
+                nbor['port'] = item['port_id']
+                nbor['host'] = item['chassis_id']
+                objects[local_intf].append(nbor)
+
         return objects
 
     def parse_ipv6_interfaces(self, data):

test/integration/targets/nxos_facts/tasks/nxapi.yaml

@@ -8,8 +8,21 @@
 - name: set test_items
   set_fact: test_items="{{ test_cases.files | map(attribute='path') | list }}"
 
+- name: enable nxapi
+  nxos_config:
+    lines:
+      - feature nxapi
+      - nxapi http port 80
+    provider: "{{ cli }}"
+
 - name: run test case
   include: "{{ test_case_to_run }}"
   with_items: "{{ test_items }}"
   loop_control:
     loop_var: test_case_to_run
+
+- name: disable nxapi
+  nxos_config:
+    lines:
+      - no feature nxapi
+    provider: "{{ cli }}"