Change warning to info when modbus is ready (#57953)

* Change warning to info.

* Make level info implicit.

homeassistant/components/modbus/modbus.py

@@ -354,7 +354,7 @@ class ModbusHub:
             return False
         else:
             message = f"modbus {self.name} communication open"
-            _LOGGER.warning(message)
+            _LOGGER.info(message)
             return True
 
     def _pymodbus_call(

tests/components/modbus/test_init.py

@@ -770,6 +770,7 @@ async def test_shutdown(hass, caplog, mock_pymodbus, mock_modbus_with_pymodbus):
 async def test_stop_restart(hass, caplog, mock_modbus):
     """Run test for service stop."""
 
+    caplog.set_level(logging.INFO)
     entity_id = f"{SENSOR_DOMAIN}.{TEST_ENTITY_NAME}"
     assert hass.states.get(entity_id).state == STATE_UNKNOWN
     hass.states.async_set(entity_id, 17)