Recognize properties with the second letter capitalized

Make ClassPropertyFetcher also recognize properties of the form "xAge" that have the second letter capitalized.

Fixes #10403

Author: JanKanis

grails-core/src/main/groovy/org/grails/core/util/ClassPropertyFetcher.java

@@ -130,8 +130,10 @@ public void doWith(CachedMethod method) throws IllegalArgumentException,
                     if (method.getParameterTypes().length == 0) {
                         String name = method.getName();
                         if (name.indexOf('$') == -1) {
-                            if (name.length() > 3 && name.startsWith("get")
-                                    && Character.isUpperCase(name.charAt(3))) {
+                            if (name.length() > 3 && name.startsWith("get") && (
+                                    Character.isUpperCase(name.charAt(3))
+                                    || (name.length() > 4 && Character.isUpperCase(name.charAt(4)))
+                            )) {
                                 name = name.substring(3);
                             } else if (name.length() > 2
                                     && name.startsWith("is")

grails-core/src/test/groovy/org/grails/core/util/ClassPropertyFetcherSpec.groovy

@@ -15,9 +15,20 @@ class ClassPropertyFetcherSpec extends Specification {
         cpf.getPropertyValue(new Author(name: "Fred"),"name") == "Fred"
         cpf.getPropertyValue(new Author(name: "Fred", books: ["test"]),"books").contains "test"
     }
+
+    void "test properties that have the fifth letter of their getter capitalized instead of the fourth"() {
+        when:"A class property fetcher is created"
+        def cpf = ClassPropertyFetcher.forClass(Person)
+
+        then:"all properties are correct"
+        def person = new Person(name: "Fred", xAge: 30)
+        person.getxAge() == 30
+        cpf.getPropertyValue(person, "xAge") == 30
+    }
 }
 class Person {
     String name
+    Integer xAge
 }
 class Author extends Person {
     Set books