Minor householding

- Remove getter for NewSetting
- Reduce visibility of classes used by DelayedRunner

src/test/java/fr/xephi/authme/runner/PendingInjection.java

@@ -10,7 +10,7 @@ import java.lang.reflect.Method;
 /**
  * Contains all necessary information to initialize a {@link InjectDelayed} field.
  */
-public class PendingInjection {
+class PendingInjection {
 
     private Field field;
     private Object[] dependencies;

src/test/java/fr/xephi/authme/runner/RunBeforeInjectings.java

@@ -11,7 +11,7 @@ import java.util.List;
  * after Mockito's @Mock, @Spy and @InjectMocks have taken effect,
  * but before {@link InjectDelayed} fields are handled.
  */
-public class RunBeforeInjectings extends Statement {
+class RunBeforeInjectings extends Statement {
 
     private final Statement next;
     private final List<FrameworkMethod> beforeInjectings;

src/test/java/fr/xephi/authme/runner/RunDelayedInjects.java

@@ -9,7 +9,7 @@ import java.util.List;
  * Statement for initializing {@link InjectDelayed} fields. These fields are
  * constructed after {@link BeforeInjecting} and before JUnit's @Before.
  */
-public class RunDelayedInjects extends Statement {
+class RunDelayedInjects extends Statement {
 
     private final Statement next;
     private final Object target;