Modifies an existing image record associated with a procedure step check. 
Use this to replace the image/thumbnail byte data or correct the name, type, 
or description metadata on an image that was previously added via `addImage`, without creating a new image record.

---
### Parameters
**chkImageId** `Integer`: Id of image to update<br />
**procedureStepCheckId** `Integer`: Id of the procedureStepCheckId<br />
**imageName** `String`: Name of image<br />
**imageType** `String`: Type of image<br />
**imageDescription** `String`: Description of image<br />
**imageBytes** `byteArray`: The image in byteArray format<br />
**thumbnail** `byteArray`: Thumbnail of image in byteArray format<br />
**userId** `Integer`:Id of the user executing the function<br />

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

---
### Example
```python
# Replace the photo on an existing procedure step check image record
chkImageId = 8830
procedureStepCheckId = 4218
imageName = "torque-check-photo-retake.jpg"
imageType = "image/jpeg"
imageDescription = "Retaken torque wrench reading after recalibration"

imageBytes = event.source.parent.getComponent('CameraCapture').primaryImage
thumbnail = event.source.parent.getComponent('CameraCapture').thumbnailImage

userId = system.kanoa.security.getIDPUserId({'userName': 'SYSTEM'})

rowsModified, msg = system.kanoa.cmms.updateImage(chkImageId, procedureStepCheckId, imageName, imageType, imageDescription, imageBytes, thumbnail, userId)
print rowsModified, msg

```