More failing-test refactoring: removed one for closed issue (#171), renamed others

Author: cowtowncoder

src/test/java/com/fasterxml/jackson/failing/TestSetterlessProperties501.java renamed to src/test/java/com/fasterxml/jackson/failing/SetterlessProperties501Test.java

@@ -15,7 +15,7 @@
 
 import static org.junit.jupiter.api.Assertions.*;
 
-class TestSetterlessProperties501 extends DatabindTestUtil {
+class SetterlessProperties501Test extends DatabindTestUtil {
     static class Poly {
         public int id;
 

src/test/java/com/fasterxml/jackson/failing/TestUnwrappedMap171.java

@@ -10,7 +10,7 @@
 import static org.junit.jupiter.api.Assertions.assertTrue;
 import static org.junit.jupiter.api.Assertions.fail;
 
-class TestUnwrappedWithUnknown650 extends DatabindTestUtil {
+class UnwrappedWithUnknown650Test extends DatabindTestUtil {
     static class A {
         @JsonUnwrapped
         public B b;