This script first searches for custom fields names that match with first name specified in the variable, and adds them to a list.
It then filters the list and removes any null value. The filtered result will be iterated once again and all the
custom fields that match the names list will be deleted.
As a Jira Administrator, I have to manage many custom fields that are created for the projects. As time goes on,
some of the fields become invalid due to completion or termination of a project and I would like to be able to delete
all those ...