Editing REF CC (section)

===v1.5===
* Updated exception and policy text based on [https://www.ref.ac.uk/publications/guidance-on-submissions-201901/ Guidance on Submissions]
* Introduce a Gold OA field to mark items as being published via Gold OA (and therefore out of scope of the OA policy)
* Report when an item is out of scope using a grey tick icon
* Pre-commit trigger to map old exception values to new exceptions (and script to apply this trigger to all relevant records on demand)
* OA retraction period to allow an item which was had the 'Date of First Open Access' set by accident to be retracted after a specified number of days
* Panel deduction based on a mapping of division values to panels
* Configurable list of values for allowed document content values

'''Upgrade Advisory:'''
When upgrading to v1.5 the introduction of a new constant may produce the following error:

<pre>
EPrints System Error

Error in configuration:
Bareword "HefceOA::Const::EX_FUR" not allowed while "strict subs" in use at /opt/eprints3/lib/cfg.d/hefce_oa_tests.pl line 32.
</pre>

A graceful restart of apache and a refresh of the page should fix this and the plugin will have been successfully upgraded.