pubsublite.spark.SamplesIntegrationTest: testWordCount failed

Note: #468 was also for this test, but it was closed more than 10 days ago. So, I didn't mark it flaky.

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commit: 80ed55b8cf2af224b958e85be538c24a9a7a7e55
buildURL: [Build Status](https://source.cloud.google.com/results/invocations/69cff936-b7a4-4959-a5fa-f2b24804377a), [Sponge](http://sponge2/69cff936-b7a4-4959-a5fa-f2b24804377a)
status: failed
Test output

java.util.concurrent.CancellationException: Task was cancelled.

	at com.google.common.util.concurrent.AbstractFuture.cancellationExceptionWithCause(AbstractFuture.java:1543)

	at com.google.common.util.concurrent.AbstractFuture.getDoneValue(AbstractFuture.java:586)

	at com.google.common.util.concurrent.AbstractFuture.get(AbstractFuture.java:567)

	at com.google.common.util.concurrent.FluentFuture$TrustedFuture.get(FluentFuture.java:91)

	at com.google.common.util.concurrent.ForwardingFuture.get(ForwardingFuture.java:66)

	at com.google.api.gax.longrunning.OperationFutureImpl.get(OperationFutureImpl.java:125)

	at pubsublite.spark.AdminUtils.createCluster(AdminUtils.java:337)

	at pubsublite.spark.SamplesIntegrationTest.beforeClass(SamplesIntegrationTest.java:84)

	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)

	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

	at java.lang.reflect.Method.invoke(Method.java:498)

	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:59)

	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)

	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:56)

	at org.junit.internal.runners.statements.RunBefores.invokeMethod(RunBefores.java:33)

	at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:24)

	at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)

	at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)

	at org.junit.runners.BlockJUnit4ClassRunner$1.evaluate(BlockJUnit4ClassRunner.java:100)

	at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:366)

	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:103)

	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:63)

	at org.junit.runners.ParentRunner$4.run(ParentRunner.java:331)

	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:79)

	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:329)

	at org.junit.runners.ParentRunner.access$100(ParentRunner.java:66)

	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:293)

	at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)

	at org.junit.runners.ParentRunner.run(ParentRunner.java:413)

	at org.apache.maven.surefire.junit4.JUnit4Provider.execute(JUnit4Provider.java:364)

	at org.apache.maven.surefire.junit4.JUnit4Provider.executeWithRerun(JUnit4Provider.java:272)

	at org.apache.maven.surefire.junit4.JUnit4Provider.executeTestSet(JUnit4Provider.java:237)

	at org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:158)

	at org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:428)

	at org.apache.maven.surefire.booter.ForkedBooter.execute(ForkedBooter.java:162)

	at org.apache.maven.surefire.booter.ForkedBooter.run(ForkedBooter.java:562)

	at org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:548)