[NO ISSUE][RT] Improve PreclusteredGroupWriter follow up

- user model changes: no
- storage format changes: no
- interface changes: no

Details:
- Fix incorrect import statement

Change-Id: I524ea3bf347b248fcd7850e212c92ac4a82cec2c
Reviewed-on: https://asterix-gerrit.ics.uci.edu/3358
Reviewed-by: Michael Blow <mblow@apache.org>
Tested-by: Dmitry Lychagin <dmitry.lychagin@couchbase.com>
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/operators/LSMPrimaryInsertOperatorNodePushable.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/operators/LSMPrimaryInsertOperatorNodePushable.java
index 92538b5..121b5b9 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/operators/LSMPrimaryInsertOperatorNodePushable.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/operators/LSMPrimaryInsertOperatorNodePushable.java
@@ -38,6 +38,7 @@
 import org.apache.hyracks.dataflow.common.comm.util.FrameUtils;
 import org.apache.hyracks.dataflow.common.data.accessors.FrameTupleReference;
 import org.apache.hyracks.dataflow.common.data.accessors.ITupleReference;
+import org.apache.hyracks.dataflow.common.data.accessors.PermutingFrameTupleReference;
 import org.apache.hyracks.dataflow.common.utils.TaskUtil;
 import org.apache.hyracks.storage.am.btree.impls.RangePredicate;
 import org.apache.hyracks.storage.am.btree.util.BTreeUtils;
@@ -49,7 +50,6 @@
 import org.apache.hyracks.storage.am.common.impls.IndexAccessParameters;
 import org.apache.hyracks.storage.am.common.impls.NoOpOperationCallback;
 import org.apache.hyracks.storage.am.common.ophelpers.IndexOperation;
-import org.apache.hyracks.storage.am.common.tuples.PermutingFrameTupleReference;
 import org.apache.hyracks.storage.am.lsm.common.api.IFrameOperationCallback;
 import org.apache.hyracks.storage.am.lsm.common.api.IFrameTupleProcessor;
 import org.apache.hyracks.storage.am.lsm.common.dataflow.LSMIndexInsertUpdateDeleteOperatorNodePushable;