Add custom field to JIRA to track resolver

Jira does not currently track an issue's resolver outside the activity timeline.

Proposed solution:

1) Add a custom field titled "ResolvedBy"

2) The Suite Utilities for Jira plugin (already owned and installed) provides an additional post-function "Update Issue Custom Field Post-Function" that can be used to set the value of "ResolvedBy" with Jira's built-in currentUser() function.

Case:

A dashboard is being crated in the Oslo office to display various statistics. A display element showing the month's top issue closers is desired, but currently available methods of querying data from Jira are unable to reliably determine who closed an issue.