Separate context related info from plain label related info in context-labels.json and labels.json

[TobiasNx]

The ettiket-maker does two things:

1. add labels were labels are missing
2. creates the context for json-ld

It uses all files in src/main/resources/labels:

But only those with "name" are added to the context while those with only "label" are not.
Some of the values in the context are also in labels.json.
I suggest to consistently use context-labels.json for properties and classes that are added to the context.
While entity labels are only added in labels. Perhaps rename labels.json into entity-labels.json.

[dr0i]

I am pretty sure that this will just gain us more redundancy and pitfalls.
Read #899 (comment) .
Update https://github.com/hbz/lobid-resources/wiki/How-context.jsonld-is-generated.

[TobiasNx]

I created a PR for cleaning up context-labels.json and labels.json without renaming them.
We then have only one file for context related classes and properties.

[dr0i]

PR is merged. Closing.