[PNCCD][GAIN] Bug fix for sending gain constants to the database

Description

A bug catched by @setoodeh for resolve conflict ashes and wrong parameter given (karabo_id instead of karabo_da)

How Has This Been Tested?

This was tested by @setoodeh for the gain notebook

Relevant Documents (optional)

Types of changes

Bug fix (non-breaking change which fixes an issue)

Checklist:

• My code follows the code style of this project.

Reviewers

@hammerd @danilevc