No possibility to create a repository within any group via REST API

Description of problem:

If you look at this entity https://github.com/droolsjbpm/kie-wb-common/blob/master/kie-wb-common-services/kie-wb-common-services-api/src/main/java/org/kie/workbench/common/services/shared/rest/Repository.java ... there is no way how to set a group for the repository via REST API, so the created repository cannot be used in business central then because it seems almost invisible. For example it's not possible to build and deploy a project from the repository which is not in any group.

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