Add --add-opens options required for tests on JDK16-ea28

Description

JDK 16-ea28 now denies illegal access by default. Let's add the necessary add-opens to be safe. Hibernate Search itself doesn't need any, but some libraries we rely on for tests do.

Environment

None
Fixed

Assignee

Yoann Rodière

Reporter

Yoann Rodière

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Priority

Major