Add operationId in callback

[manasmulay]

Building on top of this 635 would it be possible to have a operation id in the payload once the operation is complete? This would be useful in case parallel operations are allowed to progress.

Thanks!

[Slach]

don't be shy to make pull request

[manasmulay]

I have created a pull request for this

This does not provide operation_id in the status API yet, will need to modify the db schema for the same. Would that be ok ? Sorry, its my first time contributing to OSS, would appreciate the review comments and any info on processes to be followed :)