Make the OSGi tests fully pass with JDK13

Description

Currently:

It would be nice if we could make these tests pass. Not an absolute requirement, but it'd be nice.

See here for failing builds with logs: http://ci.hibernate.org/view/JDK%2012/job/hibernate-search-yoann/job/tracking-jdk12-5.11/

Environment

None

Status

Assignee

Unassigned

Reporter

Yoann Rodière

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