Bug 30430: UNIMARC XSLT add field B214 display

Bug 30430: UNIMARC XSLT add field B214 display

test plan :
- Apply patch
- Find a record with a B214
- Check on both Opac-Details and Opac-Result that the field is
  displayed.
- Do the same checks on catalogue/search results and catalogue/details
  in Staff interface.
- Add a 210 field to the record (legacy)
- It should be displayed as well

Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>
Signed-off-by: Tomás Cohen Arazi <tomascohen@theke.io>