[maven-release-plugin] copy for tag dspace-7.0-preview-1

[maven-release-plugin] copy for tag dspace-5.10

[maven-release-plugin] copy for tag dspace-6.3

[maven-release-plugin] copy for tag dspace-5.9

[maven-release-plugin] copy for tag dspace-4.9

Example of patch implementation

DS-3923 manage null return in Search Methods

Create EPerson (draft)

IT for delete eperson

Implement the delete eperson method