Use Assert.state improve code readability.

Closes #3442

Author: dukbong

spring-data-jpa/src/main/java/org/springframework/data/jpa/mapping/JpaPersistentEntityImpl.java

@@ -79,10 +79,8 @@ public void verify() {
 		super.verify();
 
 		JpaPersistentProperty versionProperty = getVersionProperty();
-
-		if (versionProperty != null && versionProperty.isAnnotationPresent(Version.class)) {
-			throw new IllegalArgumentException(String.format(INVALID_VERSION_ANNOTATION, versionProperty));
-		}
+		Assert.state(versionProperty != null && versionProperty.isAnnotationPresent(Version.class),
+				() -> String.format(INVALID_VERSION_ANNOTATION, versionProperty));
 	}
 
 	JpaMetamodel getMetamodel() {