Fix based on feedback

Author: brfrn169

core/src/main/java/com/scalar/db/transaction/consensuscommit/RollbackMutationComposer.java

@@ -5,7 +5,8 @@
 import static com.scalar.db.transaction.consensuscommit.Attribute.STATE;
 import static com.scalar.db.transaction.consensuscommit.Attribute.toIdValue;
 import static com.scalar.db.transaction.consensuscommit.Attribute.toStateValue;
-import static com.scalar.db.transaction.consensuscommit.ConsensusCommitUtils.*;
+import static com.scalar.db.transaction.consensuscommit.ConsensusCommitUtils.extractAfterImageColumnsFromBeforeImage;
+import static com.scalar.db.transaction.consensuscommit.ConsensusCommitUtils.getTransactionTableMetadata;
 
 import com.scalar.db.api.ConditionBuilder;
 import com.scalar.db.api.ConditionalExpression;

core/src/test/java/com/scalar/db/io/DateColumnTest.java

@@ -2,7 +2,7 @@
 
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.assertj.core.api.Assertions.assertThatThrownBy;
-import static org.junit.jupiter.api.Assertions.*;
+import static org.junit.jupiter.api.Assertions.assertDoesNotThrow;
 
 import java.time.Clock;
 import java.time.LocalDate;

core/src/test/java/com/scalar/db/storage/jdbc/RdbEngineOracleTest.java

@@ -1,7 +1,6 @@
 package com.scalar.db.storage.jdbc;
 
 import static org.assertj.core.api.Assertions.assertThat;
-import static org.junit.jupiter.api.Assertions.*;
 
 import com.scalar.db.api.Scan.Ordering.Order;
 import com.scalar.db.api.TableMetadata;

core/src/test/java/com/scalar/db/transaction/consensuscommit/TwoPhaseConsensusCommitTest.java

@@ -66,7 +66,7 @@ public class TwoPhaseConsensusCommitTest {
   public void setUp() throws Exception {
     MockitoAnnotations.openMocks(this).close();
 
-    // Arrange1
+    // Arrange
     transaction = new TwoPhaseConsensusCommit(crud, commit, mutationOperationChecker);
 
     when(crud.areAllScannersClosed()).thenReturn(true);

core/src/test/java/com/scalar/db/util/groupcommit/GroupCommitterTest.java

@@ -1,7 +1,7 @@
 package com.scalar.db.util.groupcommit;
 
 import static org.assertj.core.api.Assertions.assertThat;
-import static org.junit.jupiter.api.Assertions.*;
+import static org.junit.jupiter.api.Assertions.assertThrows;
 import static org.mockito.ArgumentMatchers.any;
 import static org.mockito.Mockito.doReturn;
 import static org.mockito.Mockito.never;

core/src/test/java/com/scalar/db/util/groupcommit/GroupManagerTest.java

@@ -1,7 +1,7 @@
 package com.scalar.db.util.groupcommit;
 
 import static org.assertj.core.api.Assertions.assertThat;
-import static org.junit.jupiter.api.Assertions.*;
+import static org.junit.jupiter.api.Assertions.assertThrows;
 
 import com.google.common.util.concurrent.Uninterruptibles;
 import com.scalar.db.util.groupcommit.GroupCommitKeyManipulator.Keys;

data-loader/core/src/test/java/com/scalar/db/dataloader/core/dataimport/dao/ScalarDbDaoTest.java

@@ -1,13 +1,23 @@
 package com.scalar.db.dataloader.core.dataimport.dao;
 
-import static com.scalar.db.dataloader.core.UnitTestUtils.*;
+import static com.scalar.db.dataloader.core.UnitTestUtils.TEST_COLUMN_1_PK;
+import static com.scalar.db.dataloader.core.UnitTestUtils.TEST_COLUMN_2_CK;
+import static com.scalar.db.dataloader.core.UnitTestUtils.TEST_COLUMN_4;
+import static com.scalar.db.dataloader.core.UnitTestUtils.TEST_COLUMN_5;
+import static com.scalar.db.dataloader.core.UnitTestUtils.TEST_COLUMN_6;
+import static com.scalar.db.dataloader.core.UnitTestUtils.TEST_NAMESPACE;
+import static com.scalar.db.dataloader.core.UnitTestUtils.TEST_TABLE_NAME;
+import static com.scalar.db.dataloader.core.UnitTestUtils.TEST_VALUE_INT;
+import static com.scalar.db.dataloader.core.UnitTestUtils.TEST_VALUE_LONG;
 import static org.assertj.core.api.Assertions.assertThat;
 
 import com.scalar.db.api.Scan;
 import com.scalar.db.api.ScanBuilder;
 import com.scalar.db.dataloader.core.ScanRange;
 import com.scalar.db.io.Key;
-import java.util.*;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;