Fix method equality bug in ExtendedBeanInfo

A number of users reported issues with comparing method identity vs
equivalence when discovering JavaBeans property methods in
ExtendedBeanInfo.

This commit updates the implementation to consistently use '.equals()'
instead of '=='.

Issue: SPR-8079, SPR-8347

Author: cbeams

org.springframework.beans/src/main/java/org/springframework/beans/ExtendedBeanInfo.java

@@ -170,8 +170,8 @@ public ExtendedBeanInfo(BeanInfo delegate) throws IntrospectionException {
 						continue ALL_METHODS;
 					}
 				}
-				if (method == pd.getReadMethod()
-						|| (pd instanceof IndexedPropertyDescriptor && method == ((IndexedPropertyDescriptor) pd).getIndexedReadMethod())) {
+				if (method.equals(pd.getReadMethod())
+						|| (pd instanceof IndexedPropertyDescriptor && method.equals(((IndexedPropertyDescriptor) pd).getIndexedReadMethod()))) {
 					// yes -> copy it, including corresponding setter method (if any -- may be null)
 					if (pd instanceof IndexedPropertyDescriptor) {
 						this.addOrUpdatePropertyDescriptor(pd, pd.getName(), pd.getReadMethod(), pd.getWriteMethod(), ((IndexedPropertyDescriptor)pd).getIndexedReadMethod(), ((IndexedPropertyDescriptor)pd).getIndexedWriteMethod());