Add logging

I have added logs for deleting and adding terms.
Kindly find the screenshot

It might be better to keep the log message consistent with Core logging.

See attached patch.

Agree with @tinny.
Also, it's better to log individual terms instead of the list.

The MR !82 is based on changes from patch #7.

dburiak → changed the visibility of the branch 3533552-add-logging to hidden.

dburiak → changed the visibility of the branch 2.0.x to hidden.