Scroll always targets all indexes

Description

That was caught by a test run on AWS, where there's an unused Kibana index, resulting in scrolls returning more results than expected.

See https://ci.hibernate.org/blue/organizations/jenkins/hibernate-search/detail/master/791/tests/

Environment

None

Assignee

Yoann Rodière

Reporter

Yoann Rodière

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Priority

Major
Configure