Update and rename CompoundOperatorsTest.java to CompoundOperatorsUnitTest.java

Author: lor6

core-java-lang/src/test/java/com/baeldung/compoundoperators/CompoundOperatorsTest.java core-java-lang/src/test/java/com/baeldung/compoundoperators/CompoundOperatorsUnitTest.java

@@ -4,7 +4,7 @@
 
 import static org.junit.Assert.assertEquals;
 
-public class CompoundOperatorsTest {
+public class CompoundOperatorsUnitTest {
 
     @Test
     public void whenAssignmentOperatorIsUsed_thenValueIsAssigned() {