[MINOR] Fix corrupted git history (case-sensitive filename change)

A recent change corrupted the git history, such that on Windows with
case-insensitive file system, even a fresh git clone caused uncommitted
changes which cannot be resolved via stash or restore.

Here is the output from git clone:

warning: the following paths have collided (e.g. case-sensitive paths
on a case-insensitive filesystem) and only one from the same
colliding group is in the working tree:

  'src/test/java/org/apache/sysds/test/functions/compress/wordembedding/WordEmbeddingUseCase.java'
  'src/test/java/org/apache/sysds/test/functions/compress/wordembedding/wordEmbeddingUseCase.java'

src/test/java/org/apache/sysds/test/functions/compress/wordembedding/wordEmbeddingUseCase.java → src/test/java/org/apache/sysds/test/functions/compress/wordembedding/WordEmbeddingTest.java

@@ -21,7 +21,6 @@
 
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertTrue;
-import static org.junit.Assert.fail;
 
 import java.io.File;
 
@@ -39,7 +38,7 @@
 import org.apache.sysds.test.functions.compress.table.CompressedTableOverwriteTest;
 import org.junit.Test;
 
-public class wordEmbeddingUseCase extends AutomatedTestBase {
+public class WordEmbeddingTest extends AutomatedTestBase {
 
 	protected static final Log LOG = LogFactory.getLog(CompressedTableOverwriteTest.class.getName());