Reports incorrect 'mode' configuration in the @DirtiesContext annotation.

Example:

  @ContextConfiguration
  @DirtiesContext(methodMode = MethodMode.AFTER_METHOD, // Setting the method mode on an annotated test class has no meaning. For class-level control, use classMode instead.
                  hierarchyMode = DirtiesContext.HierarchyMode.CURRENT_LEVEL) // hierarchyMode should be used when the context is configured as part of a hierarchy via @ContextHierarchy
  public class MyTest {
    @DirtiesContext(classMode = DirtiesContext.ClassMode.AFTER_CLASS, // Setting the class mode on an annotated test method has no meaning. For method-level control use methodMode instead..
                     hierarchyMode = DirtiesContext.HierarchyMode.CURRENT_LEVEL) // hierarchyMode should be used when the context is configured as part of a hierarchy via @ContextHierarchy
    public void testFoo() {...}
  }