Python postcommit failing portableWordCountSparkRunnerBatch

Guessing this was due to recent changes such as for the gradle upgrade (BEAM-13430).

Execution failed for task ':sdks:python:test-suites:portable:py37:portableWordCountSparkRunnerBatch'.

'Exception in thread "grpc-default-executor-0" java.lang.NoClassDefFoundError: org/apache/spark/streaming/api/java/JavaStreamingListener '
'\tat org.apache.beam.runners.spark.SparkJobInvoker.createJobInvocation(SparkJobInvoker.java:101)'
'\tat org.apache.beam.runners.spark.SparkJobInvoker.invokeWithExecutor(SparkJobInvoker.java:82)'
'\tat org.apache.beam.runners.jobsubmission.JobInvoker.invoke(JobInvoker.java:48)'
'\tat org.apache.beam.runners.jobsubmission.InMemoryJobService.run(InMemoryJobService.java:246)'
'\tat org.apache.beam.model.jobmanagement.v1.JobServiceGrpc$MethodHandlers.invoke(JobServiceGrpc.java:948)'
'\tat org.apache.beam.vendor.grpc.v1p36p0.io.grpc.stub.ServerCalls$UnaryServerCallHandler$UnaryServerCallListener.onHalfClose(ServerCall s.java:182)'
'\tat org.apache.beam.vendor.grpc.v1p36p0.io.grpc.PartialForwardingServerCallListener.onHalfClose(PartialForwardingServerCallListener.ja va:35)'
'\tat org.apache.beam.vendor.grpc.v1p36p0.io.grpc.ForwardingServerCallListener.onHalfClose(ForwardingServerCallListener.java:23)'
'\tat org.apache.beam.vendor.grpc.v1p36p0.io.grpc.ForwardingServerCallListener$SimpleForwardingServerCallListener.onHalfClose(Forwarding ServerCallListener.java:40)'
'\tat org.apache.beam.vendor.grpc.v1p36p0.io.grpc.Contexts$ContextualizedServerCallListener.onHalfClose(Contexts.java:86)'
'\tat org.apache.beam.vendor.grpc.v1p36p0.io.grpc.internal.ServerCallImpl$ServerStreamListenerImpl.halfClosed(ServerCallImpl.java:331)'
'\tat org.apache.beam.vendor.grpc.v1p36p0.io.grpc.internal.ServerImpl$JumpToApplicationThreadServerStreamListener$1HalfClosed.runInConte xt(ServerImpl.java:797)'
'\tat org.apache.beam.vendor.grpc.v1p36p0.io.grpc.internal.ContextRunnable.run(ContextRunnable.java:37)'
'\tat org.apache.beam.vendor.grpc.v1p36p0.io.grpc.internal.SerializingExecutor.run(SerializingExecutor.java:123)'
'\tat java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)'
'\tat java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)'
'\tat java.lang.Thread.run(Thread.java:748)'
'Caused by: java.lang.ClassNotFoundException: org.apache.spark.streaming.api.java.JavaStreamingListener'
'\tat java.net.URLClassLoader.findClass(URLClassLoader.java:382)'