DS-1823 move dspace.url to build.properties

dspace.url is now independent from baseUrl
add context to  two methods parameters  to have monthly statistics localised
DS-1596 fix for Mirage Theme only.
DS-1596 fix for "Reference" theme
DS-1596 fix for "Classic" theme
DS-1596 fix for "Kubrick" theme
Fix DS-1596 for 'template' theme.
DS-1596 fix for "mobile" theme
DS-1917 JSPUI validity fixes (several non-controversial fixes)
edited for junii2 version 3.1
Select the collection already selected in the previous operation
DS-1945 New override property request.item.helpdesk.override to have all email requests sent to the helpdesk instead of the item submitter
DS-1945 refactor to move code into dspace-api
Add RequestItemHelpdeskStrategy, that can be enabled with Spring DI

Cleans up Sam's "hard coded" approach
DS-1945 RequestItem Helpdesk has options to contact requester, and author
DS-1945 Add request_message to requestitem DB table

Also, refactored requestitem to be a dspace-api "model", moved all DB logic
from XMLUI regarding this module to the dspace-api model.

Add the requestitem.request_message to display in the contact-author form,
so they can see what the original request message was.
DS-1945 Add license headers for requestitem changes
Restricted Item request form, add link to login page for members
[DS-2005] Discovery hit highlighting issue with abstracts/fulltext
For request-item move the you can login Button before the request item para