Requests - display item's "effective location" as shelving location

Purpose - to display the item's "effective location" on the Request Detail, Edit Request, and New Request screens

User story:

• As a library staff person
• I want to see the Effective location for an item in the request record
• So I know where an item's current "home" is

Scenarios:

1. Scenario
   • Given a the "Item information" section of the request create, edit and view modes
   • When displayed
   • Then the "Shelving location" field should be populated with the item's effective location

Note: An item's effective location value should be calculated as shown in this document: https://wiki.folio.org/display/RA/Effective+Location+Logic