REPO-1810: V1 REST API - update API spec (for createGroup) to indicate that GROUP_ is expected prefix of the id    - updated API spec
REPO-1810: V1 REST API - update API spec (for createGroup) to indicate that GROUP_ is expected prefix of the id
   - updated API spec

Alfresco/rest-api-explorer,Alfresco/rest-api-explorer,Alfresco/rest-api-explorer