Remove flaky tests

Author: Ajay Kannan

gcloud-java-bigquery/src/test/java/com/google/gcloud/bigquery/it/ITBigQueryTest.java

@@ -71,6 +71,7 @@
 
 import org.junit.AfterClass;
 import org.junit.BeforeClass;
+import org.junit.Ignore;
 import org.junit.Rule;
 import org.junit.Test;
 import org.junit.rules.Timeout;
@@ -623,6 +624,7 @@ public void testInsertAllWithErrors() {
     assertTrue(bigquery.delete(TableId.of(DATASET, tableName)));
   }
 
+  @Ignore("Flaky test; see issue #836")
   @Test
   public void testListAllTableData() {
     Page<List<FieldValue>> rows = bigquery.listTableData(TABLE_ID);
@@ -906,6 +908,7 @@ public void testCancelNonExistingJob() {
     assertFalse(bigquery.cancel("test_cancel_non_existing_job"));
   }
 
+  @Ignore("Flaky test; see #836")
   @Test
   public void testInsertFromFile() throws InterruptedException {
     String destinationTableName = "test_insert_from_file_table";