Updates the passed field value for the given routeStepEventId

---
### Parameters
**routeStepEventId** `Integer`: Id of the route step event to update<br />
**field** `String`: Name of column<br />
**value** `pyObject`: Datatype of referenced field<br />
**userId** `Integer`: Id of user executing the function<br />

---
### Returns
**# of records modified** `Integer`<br />
**message** `String` None if success<br />

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### Example
```python
# Add the lotOperationEventId
recordsModified, msg = system.kanoa.lot.updateRouteStepEventField(5001, "lotOperationEventId", 2980, 123)
```