git: openjdk/jcstress: CODETOOLS-7902925: jcstress: Fix new Sonar warnings

[duke]

Changeset: f022ee13
Author:    Aleksey Shipilëv <shade at redhat.com>
Committer: GitHub <noreply at github.com>
Date:      2021-05-05 16:06:15 +0000
URL:       https://git.openjdk.java.net/jcstress/commit/f022ee13d8d0a8916741734bbedf18d2011b7256

CODETOOLS-7902925: jcstress: Fix new Sonar warnings


! jcstress-core/src/main/java/org/openjdk/jcstress/infra/runners/AbstractThread.java