test: make bulk mutate it less flaky

Change-Id: I13871cd3a6903eb07ecc272df5bff0519b256816

Author: mutianf

google-cloud-bigtable/src/test/java/com/google/cloud/bigtable/data/v2/it/BulkMutateIT.java

@@ -232,26 +232,19 @@ public void testManyMutationsOnAuthorizedView() throws IOException, InterruptedE
               .first()
               .call(Query.create(testEnvRule.env().getTableId()).rowKey(rowPrefix + "test-key"));
       assertThat(row.getCells()).hasSize(100002);
-    }
 
-    // We should not be able to mutate rows outside the authorized view
-    try {
-      try (BigtableDataClient client = BigtableDataClient.create(settings);
-          Batcher<RowMutationEntry, Void> batcherOutsideAuthorizedView =
-              client.newBulkMutationBatcher(
-                  AuthorizedViewId.of(
-                      testEnvRule.env().getTableId().getTableId(), testAuthorizedView.getId()))) {
-        String keyOutsideAuthorizedView = UUID.randomUUID() + "-outside-authorized-view";
-        RowMutationEntry rowMutationEntry = RowMutationEntry.create(keyOutsideAuthorizedView);
-        rowMutationEntry.setCell(
-            testEnvRule.env().getFamilyId(), AUTHORIZED_VIEW_COLUMN_QUALIFIER, "test-value");
-        @SuppressWarnings("UnusedVariable")
-        ApiFuture<Void> ignored = batcherOutsideAuthorizedView.add(rowMutationEntry);
-        batcherOutsideAuthorizedView.flush();
+      // We should not be able to mutate rows outside the authorized view
+      String keyOutsideAuthorizedView = UUID.randomUUID() + "-outside-authorized-view";
+      RowMutationEntry rowMutationEntry = RowMutationEntry.create(keyOutsideAuthorizedView);
+      rowMutationEntry.setCell(
+          testEnvRule.env().getFamilyId(), AUTHORIZED_VIEW_COLUMN_QUALIFIER, "test-value");
+      try {
+        ApiFuture<Void> ignored = batcher.add(rowMutationEntry);
+        batcher.flush();
+        fail("Should not be able to apply bulk mutation on rows outside authorized view");
+      } catch (Exception e) {
+        // ignore
       }
-      fail("Should not be able to apply bulk mutation on rows outside authorized view");
-    } catch (Exception e) {
-      // Ignore.
     }
 
     testEnvRule