rename file so that it fits to the Maven convention

src/test/java/de/monticore/lang/tagging/ParserTagValue.java → src/test/java/de/monticore/lang/tagging/ParserTagValueTest.java

@@ -27,7 +27,7 @@ import org.junit.Test;
 /**
  * Created by MichaelvonWenckstern on 13.06.2016.
  */
-public class ParserTagValue {
+public class ParserTagValueTest {
 
 //  @Test
 //  public void testUnit() throws Exception {