Norman Maurer aa0451d26d Fix flaky GlobalEventExecutorTest.* (#9074)
Motivation:

In GlobalEventExecutorTest we used Thread.sleep(...) which can produce flaky results (as seen on the CI). We should use another alternative during tests.

Modifications:

Replace Thread.sleep(...) with join()

Result:

No more flaky GlobalEventExecutor tests.
2019-04-29 08:33:18 +02:00
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