Rename unsafe Java test suites to match Scala test naming convention.

This is necessary in order for SBT to recognize and run these suites.

unsafe/src/test/java/org/apache/spark/unsafe/array/TestLongArray.java → unsafe/src/test/java/org/apache/spark/unsafe/array/LongArraySuite.java

@@ -22,7 +22,7 @@
 
 import org.apache.spark.unsafe.memory.MemoryBlock;
 
-public class TestLongArray {
+public class LongArraySuite {
 
   @Test
   public void basicTest() {

unsafe/src/test/java/org/apache/spark/unsafe/bitset/TestBitSet.java → unsafe/src/test/java/org/apache/spark/unsafe/bitset/BitSetSuite.java

@@ -23,7 +23,7 @@
 
 import org.apache.spark.unsafe.memory.MemoryBlock;
 
-public class TestBitSet {
+public class BitSetSuite {
 
   private static BitSet createBitSet(int capacity) {
     assert capacity % 64 == 0;

unsafe/src/test/java/org/apache/spark/unsafe/hash/TestMurmur3_x86_32.java → unsafe/src/test/java/org/apache/spark/unsafe/hash/Murmur3_x86_32Suite.java

@@ -28,7 +28,7 @@
 /**
  * Test file based on Guava's Murmur3Hash32Test.
  */
-public class TestMurmur3_x86_32 {
+public class Murmur3_x86_32Suite {
 
   private static final Murmur3_x86_32 hasher = new Murmur3_x86_32(0);
 

unsafe/src/test/java/org/apache/spark/unsafe/map/AbstractTestBytesToBytesMap.java → unsafe/src/test/java/org/apache/spark/unsafe/map/AbstractBytesToBytesMapSuite.java

@@ -33,7 +33,7 @@
 import org.apache.spark.unsafe.memory.MemoryManager;
 import static org.apache.spark.unsafe.PlatformDependent.BYTE_ARRAY_OFFSET;
 
-public abstract class AbstractTestBytesToBytesMap {
+public abstract class AbstractBytesToBytesMapSuite {
 
   private final Random rand = new Random(42);
 

unsafe/src/test/java/org/apache/spark/unsafe/map/TestBytesToBytesMapOffHeap.java → unsafe/src/test/java/org/apache/spark/unsafe/map/BytesToBytesMapOffHeapSuite.java

@@ -19,7 +19,7 @@
 
 import org.apache.spark.unsafe.memory.MemoryAllocator;
 
-public class TestBytesToBytesMapOffHeap extends AbstractTestBytesToBytesMap {
+public class BytesToBytesMapOffHeapSuite extends AbstractBytesToBytesMapSuite {
 
   @Override
   protected MemoryAllocator getMemoryAllocator() {

unsafe/src/test/java/org/apache/spark/unsafe/map/TestBytesToBytesMapOnHeap.java → unsafe/src/test/java/org/apache/spark/unsafe/map/BytesToBytesMapOnHeapSuite.java

@@ -19,7 +19,7 @@
 
 import org.apache.spark.unsafe.memory.MemoryAllocator;
 
-public class TestBytesToBytesMapOnHeap extends AbstractTestBytesToBytesMap {
+public class BytesToBytesMapOnHeapSuite extends AbstractBytesToBytesMapSuite {
 
   @Override
   protected MemoryAllocator getMemoryAllocator() {