Store should remember the ontology path it was created with
Imagine I do the following:
tracker endpoint --database=/tmp/my-database --ontology-path=/tmp/my-custom-ontology
tracker sparql --database=/tmp/my-database ...Q. What ontologies will the tracker sparql command use?
A. The Nepomuk ontologies.
This is counter intuitive, if I create a store with a custom ontology then I probably want to always use that custom ontology.
This issue is noticable in the CI failures for !198 (merged) and !200 (merged). These tests are creating a database using an uninstalled copy of the Nepomuk ontologies, and then running CLI commands which fail as they try to use ontologies from $prefix which are not present.
I guess we should fix this by storing the ontology path with the database somehow, perhaps a minimal config file would make sense ? The other option would be to add the --ontology-path argument to every single command, which seems less convenient.