add test

Author: stankiewicz

sdks/java/core/src/test/java/org/apache/beam/sdk/transforms/MetadataPropagationTest.java

@@ -34,7 +34,6 @@
 import org.joda.time.Duration;
 import org.joda.time.Instant;
 import org.junit.After;
-import org.junit.Ignore;
 import org.junit.Rule;
 import org.junit.Test;
 import org.junit.experimental.categories.Category;
@@ -67,7 +66,6 @@ public void process(ProcessContext pc, OutputReceiver<String> r) {
 
   @Test
   @Category(NeedsRunner.class)
-  @Ignore
   public void testMetadataPropagationAcrossShuffleParameter() {
     WindowedValues.WindowedValueCoder.setMetadataSupported();
     PCollection<String> results =