Obtain merged annotation for annotation validation.

We now validate declared annotations by pre-processing these through AnnotatedElementUtils to ensure a proper comparison. Previously, we compared annotation in their declared form (AnnotatedElement.getAnnotations()) with merged annotations which could fail due to aliasing effects of merged annotations.

Closes #2368.

src/test/java/org/springframework/data/mapping/model/AnnotationBasedPersistentPropertyUnitTests.java

@@ -356,6 +356,7 @@ public class AnnotationBasedPersistentPropertyUnitTests<P extends AnnotationBase
 		}
 
 		@MyAnnotation
+		@RevisedAnnnotationWithAliasFor(value = "my-value")
 		public void setSetter(String setter) {
 			this.setter = setter;
 		}