[config reload] Fixing config reload when timer based delayed services are disabled

config/main.py

@@ -732,8 +732,15 @@ def _get_sonic_services():
 
 
 def _get_delayed_sonic_services():
-    out = clicommon.run_command("systemctl list-dependencies --plain sonic-delayed.target | sed '1d'", return_cmd=True)
-    return (unit.strip().rstrip('.timer') for unit in out.splitlines())
+    rc1 = clicommon.run_command("systemctl list-dependencies --plain sonic-delayed.target | sed '1d'", return_cmd=True)
+    rc2 = clicommon.run_command("systemctl is-enabled {}".format(rc1.replace("\n", " ")), return_cmd=True)
+    timer = [line.strip() for line in rc1.splitlines()]
+    state = [line.strip() for line in rc2.splitlines()]
+    services = []
+    for unit in timer:
+        if state[timer.index(unit)] == "enabled":
+            services.append(unit.rstrip(".timer"))
+    return services
 
 
 def _reset_failed_services():

tests/config_test.py

@@ -84,6 +84,8 @@ def mock_run_command_side_effect(*args, **kwargs):
             return 'snmp.timer'
         elif command == "systemctl list-dependencies --plain sonic.target | sed '1d'":
             return 'swss'
+        elif command == "systemctl is-enabled snmp.timer":
+            return 'enabled'
         else:
             return ''
 
@@ -164,7 +166,7 @@ def test_load_minigraph(self, get_cmd_module, setup_single_broadcom_asic):
             mock_run_command.assert_any_call('systemctl reset-failed swss')
             # Verify "systemctl reset-failed" is called for services under sonic-delayed.target 
             mock_run_command.assert_any_call('systemctl reset-failed snmp')
-            assert mock_run_command.call_count == 10
+            assert mock_run_command.call_count == 11
 
     def test_load_minigraph_with_port_config_bad_format(self, get_cmd_module, setup_single_broadcom_asic):
         with mock.patch(