Updates the passed field value for the given routeId

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### Parameters
**routeEventId** `Integer`: Id of route to be updated<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
# Update the route Id
userId = 123
recordsModified, msg = system.kanoa.lot.updateRouteEventField(5, 'routeId', 3, userId)
```