Add dataset security

[jnehring]

Please add dataset security to FREME NER. I think you cannot use the managed resource controller. I suggest this approach:

• Access level logic should be equivalent to the other protected resources (visibility public or private, read / write rights according to this)
• FREME NER uses the DatasetSimple database entity. Add a field "user" and a field "visibility" to this entity. This field is optional. When FREME NER writes a dataset to the database it leaves these fields empty.
• When creating a dataset, user and visibility will be entered in the Java code, after the Scala code has been executed.
• Before enrichment, read, update, delete dataset, the access will be checked by the user.
• Delete the other database entity.

[ArneBinder]

Implemented dataset management security. The table holding the dataset metadata is called dataset_metadata.

TODO:

• fix table database_metadata on freme-dev
• implement dataset security for POST /e-entity/freme-ner/documents

[jnehring]

added table manually. wait for acl problems.

[jnehring]

The "ACL Problem" from #86 should be fixed now.

[ArneBinder]

implemented. TODO: testing

[ArneBinder]

Dataset management does not work because of https://github.com/freme-project/basic-services/issues/36

[ArneBinder]

fixed. Can we close this?

[jnehring]

Waiting for #89, #90

[jnehring]

This works now