OnlineIndexerSimpleTest.testConfigLoader() test failure

[scgray]

During a PRB run for https://github.com/FoundationDB/fdb-record-layer/pull/926, this test failed with:

org.opentest4j.AssertionFailedError: expected: <95> but was: <94>
	at org.junit.jupiter.api.AssertionUtils.fail(AssertionUtils.java:55)
	at org.junit.jupiter.api.AssertionUtils.failNotEqual(AssertionUtils.java:62)
	at org.junit.jupiter.api.AssertEquals.assertEquals(AssertEquals.java:150)
	at org.junit.jupiter.api.AssertEquals.assertEquals(AssertEquals.java:145)
	at org.junit.jupiter.api.Assertions.assertEquals(Assertions.java:510)
	at com.apple.foundationdb.record.provider.foundationdb.OnlineIndexerSimpleTest.testConfigLoader(OnlineIndexerSimpleTest.java:876)

[nblintao]

@jjezra Not same, but it might be related to the issue you found.

[MMcM]

The failing condition asserts about the consistency of the state of a running index builder: there is no means of guaranteeing that getLimit and getConfigLoaderInvocationCount match when two unsynchronized calls are needed to get them.