Long execution delay when using DirectRunner to read from BigQuery Table

When using DirectRunner to execute a simple select query against a BigQuery table that contains 100 rows, the pipeline stalls for over 3 minutes. The BigQuery UI can run the same query in under 2 seconds.

A similar issue was reported here: [https://stackoverflow.com/questions/46907735/beam-direct-runner-slow-bigquery-read](https://www.google.com/url?q=https://stackoverflow.com/questions/46907735/beam-direct-runner-slow-bigquery-read&sa=D&source=hangouts&ust=1528912448506000&usg=AFQjCNHp9JWHFJOnJlBJmLODU1cGBIeXtg)

I ran a thread dump using Visual M seems like the main thread was in a state of backoff: 

java.lang.Thread.State: TIMED_WAITING (sleeping)
at java.lang.Thread.sleep(Native Method)
at com.google.api.client.util.Sleeper$1.sleep(Sleeper.java:43)
at com.google.api.client.util.BackOffUtils.next(BackOffUtils.java:50)
at org.apache.beam.sdk.io.gcp.bigquery.BigQueryServicesImpl.nextBackOff(BigQueryServicesImpl.java:870)
at org.apache.beam.sdk.io.gcp.bigquery.BigQueryServicesImpl.access$500(BigQueryServicesImpl.java:79)
at org.apache.beam.sdk.io.gcp.bigquery.BigQueryServicesImpl$JobServiceImpl.pollJob(BigQueryServicesImpl.java:273)
at org.apache.beam.sdk.io.gcp.bigquery.BigQueryServicesImpl$JobServiceImpl.pollJob(BigQueryServicesImpl.java:247)
at org.apache.beam.sdk.io.gcp.bigquery.BigQueryQuerySource.executeQuery(BigQueryQuerySource.java:191)
at org.apache.beam.sdk.io.gcp.bigquery.BigQueryQuerySource.getTableToExtract(BigQueryQuerySource.java:136)
at org.apache.beam.sdk.io.gcp.bigquery.BigQuerySourceBase.extractFiles(BigQuerySourceBase.java:103)
at org.apache.beam.sdk.io.gcp.bigquery.BigQuerySourceBase.split(BigQuerySourceBase.java:134)
at org.apache.beam.runners.direct.BoundedReadEvaluatorFactory$InputProvider.getInitialInputs(BoundedReadEvaluatorFactory.java:210)
at org.apache.beam.runners.direct.ReadEvaluatorFactory$InputProvider.getInitialInputs(ReadEvaluatorFactory.java:87)
at org.apache.beam.runners.direct.RootProviderRegistry.getInitialInputs(RootProviderRegistry.java:62)
at org.apache.beam.runners.direct.ExecutorServiceParallelExecutor.start(ExecutorServiceParallelExecutor.java:144)
at org.apache.beam.runners.direct.DirectRunner.run(DirectRunner.java:201)
at org.apache.beam.runners.direct.DirectRunner.run(DirectRunner.java:62)
at org.apache.beam.sdk.Pipeline.run(Pipeline.java:311)
at org.apache.beam.sdk.Pipeline.run(Pipeline.java:297)

Imported from Jira [BEAM-4548](https://issues.apache.org/jira/browse/BEAM-4548). Original Jira may contain additional context.
Reported by: bkungfoo.