[DS-4475] Add support for Controlled Vocabulary in the REST API v7

[dspace-bot]

Imported from JIRA [DS-4475] created by bollini

DSpace provides support for hierarchical vocabulary defined in external xml files https://wiki.lyrasis.org/display/DSDOC7x/Authority+Control+of+Metadata+Values#AuthorityControlofMetadataValues-HierarchicalTaxonomiesandControlledVocabularies

and it supported by the authority control (isHierarchical() method) already exposed over the new REST API, see
https://github.com/DSpace/Rest7Contract/blob/master/authorities.md

Nevertheless, to build an efficient UX we need to add some extra feature as

• the capability to configure which level are shown open by default
• the capability to get the top element in a vocabulary to start to build the tree
• a search capability by parent to allow an easy drilldown

These features have been already implemented in DSpace-CRIS 7 but need to be cleaned, formalized (rest contract) and enriched with proper test to be included in DSpace 7

See commits
REST:
4Science@129909f
4Science@ccda1ef
4Science@672f486
4Science@60aae2d
4Science@23df3c7
4Science@0859dc0
4Science@dfb5fdf
4Science@cc8139a
4Science@96ea164
4Science@1fdf95c
4Science@15f5c64
4Science@d6ade53

Angular
4Science/dspace-angular@62e31e8
4Science/dspace-angular@719b043

[dspace-bot]

bollini said:

Our estimation for the missing work is 3d on the REST side and 2d on the Angular side

[dspace-bot]

bollini said:

REST PRs here
DSpace/RestContract#120
#2743

[tdonohue]

Closing, this was fixed/implemented in DSpace/RestContract#128 and #2792 Already exists in 7.0