nxos integration fix part 1 (#27069)

* Assorted Python 3 fixes

* Fix `testcase` definition in integration tests

* Fix nxos_acl_interface

* clean up nxapi after nxos_nxapi

test/units/modules/network/nxos/test_nxos_acl_interface.py

@@ -48,8 +48,7 @@ class TestNxosAclInterfaceModule(TestNxosModule):
 
             for item in commands:
                 try:
-                    obj = json.loads(item)
-                    command = obj['command']
+                    command = item['command']
                 except ValueError:
                     command = item
                 filename = '%s.txt' % str(command).split(' | ')[0].replace(' ', '_')