Deprecate/move CGLIB methods AopUtils=>ClassUtils

isCglibProxy* methods in AopUtils are useful in lower-level modules,
i.e. those that cannot depend on .aop.  Therefore copied these methods
to ClassUtils; deprecated the existing ones in AopUtils and now
delegating to the new location; switched all usage of
AopUtils#isCglibProxy* within the framework to use
ClassUtils#isCglibProxy* instead.

org.springframework.core/src/main/java/org/springframework/util/ClassUtils.java

@@ -1083,4 +1083,30 @@ public abstract class ClassUtils {
 		}
 	}
 
+	/**
+	 * Check whether the given object is a CGLIB proxy.
+	 * @param object the object to check
+	 * @see org.springframework.aop.support.AopUtils#isCglibProxy(Object)
+	 */
+	public static boolean isCglibProxy(Object object) {
+		return ClassUtils.isCglibProxyClass(object.getClass());
+	}
+
+	/**
+	 * Check whether the specified class is a CGLIB-generated class.
+	 * @param clazz the class to check
+	 */
+	public static boolean isCglibProxyClass(Class<?> clazz) {
+		return (clazz != null && isCglibProxyClassName(clazz.getName()));
+	}
+
+	/**
+	 * Check whether the specified class name is a CGLIB-generated class.
+	 * @param className the class name to check
+	 */
+	public static boolean isCglibProxyClassName(String className) {
+		return (className != null && className.contains(CGLIB_CLASS_SEPARATOR));
+	}
+
+
 }