Minor updates to README for 7.2

Merge pull request DSpace#1376 from atmire/remove-authorization-mocks

remove authorization mocks left over from PR DSpace#1105

Correct year in LICENSE

Merge pull request DSpace#1090 from tdonohue/update_docker

Update Docker Compose scripts to resync with DSpace/DSpace

Merge pull request DSpace#874 from atmire/w2p-72956_delete-eperson

Delete eperson

Merge pull request DSpace#749 from atmire/Edit-collection-item-template

Edit collection item template

Merge pull request DSpace#651 from bram-atmire/2020-04-09-New-Message…

…-Keys

Extending catalogs with missing messages April 9th

Merge pull request DSpace#606 from 4Science/#603_mydspace_fixes

DSpace#603 mydspace fixes

Reset URL to use DSpace 7 REST API Demo site.