Delete Dataspace by name(id)

Implement

1. REST Endpoint in CPS-Core
2. Java Api method in CPS-Service
3. Data Persistence Service
   1. using JPA https://spring.io/projects/spring-data-jpa
   2. DB Integration Test, see https://wiki.onap.org/display/DW/CPS+Persistence+layer+testing

Condition before delete: all anchors should have been deleted

Open Issue

1. will SchemaSets automatically be deleted once all anchors using them heven been deletes

Implementation Proposal

https://wiki.onap.org/display/DW/Implementation+Proposal+for+Delete+Dataspace

A/C

1. Dataspace is removed from dataspace table (can only be shown through SQL client)
2. JAVA API wil throw exception if not all anchors have been deleted first
3. REST API should return XXX statusCode if not all anchors have been deleted first
   1. statusCode to be agreed and documented here: https://wiki.onap.org/display/DW/CPS+Exceptions+and+REST+API+HTTP+Response+Codes
4. REST API should return 400 statusCode if dataspace(name) does not exist (like #5 in page above)