Unify the use of "tools-services" in the API
@Seung-Bin.Yim pointed out, that currently in the API the name "tools-services" is not used everywhere. If you run a GET on /api/tools-services this returns the tools and services in a "tools"-array. For consistency we should use instead "tools-services". Not sure, if there are other leftovers where only "tools" is used.
@mkozak @swolarz can we change this in backend? If so, we need to coordinate with frontend so that we only have a short unoperable state, what do you think @stefan.probst
Not sure, if we need to inform other services, at least ingest will be probably concerned, @sotiris.karampatakis
Asking @matej.durco what he thinks about this.