Avoid I18n.enforce_available_locales deprecation warning.
Merge pull request #462 from ontohub/correcting460_authorization

Some issues with authorization, fixes #460.
Merge pull request #414 from ontohub/augmenting318_listing_ontologies_for_repositories

Allow using the ontology search as filter of ontologies.
Handle PG::Error in the state_updater
Redundant error message removed
Merge branch 'staging' into develop
Merge branch 'develop' into develop.ontohub.org