Fix junos_netconf idempotency issues (#27804)

* Fix junos_netconf idempotency issues

* Fix pep8 issue

* Fix pep8 issue

lib/ansible/modules/network/junos/junos_netconf.py

@@ -82,16 +82,11 @@ def map_obj_to_commands(updates, module):
     want, have = updates
     commands = list()
 
-    if want['state'] == 'present' and have['state'] == 'absent':
-        commands.append(
-            'set system services netconf ssh port %s' % want['netconf_port']
-        )
-
-    elif want['state'] == 'absent' and have['state'] == 'present':
-        commands.append('delete system services netconf')
-
-    elif want['state'] == 'present':
-        if want['netconf_port'] != have.get('netconf_port'):
+    if want['state'] == 'absent':
+        if have['state'] == 'present':
+            commands.append('delete system services netconf')
+    else:
+        if have['state'] == 'absent' or want['netconf_port'] != have.get('netconf_port'):
             commands.append(
                 'set system services netconf ssh port %s' % want['netconf_port']
             )
@@ -113,7 +108,7 @@ def map_config_to_obj(module):
     config = str(out).strip()
 
     obj = {'state': 'absent'}
-    if config:
+    if 'ssh' in config:
         obj.update({
             'state': 'present',
             'netconf_port': parse_port(config)