Add workaround for GROOVY-11512

Author: jdaugherty

grails-datastore-gorm-hibernate5/src/main/groovy/org/grails/orm/hibernate/access/TraitPropertyAccessStrategy.java

@@ -18,6 +18,14 @@ public class TraitPropertyAccessStrategy implements PropertyAccessStrategy {
     @Override
     public PropertyAccess buildPropertyAccess(Class containerJavaType, String propertyName) {
         Method readMethod = ReflectionUtils.findMethod(containerJavaType, NameUtils.getGetterName(propertyName));
+        if(readMethod == null) {
+            // See https://issues.apache.org/jira/browse/GROOVY-11512
+            readMethod = ReflectionUtils.findMethod(containerJavaType, NameUtils.getGetterName(propertyName, true));
+            if(readMethod != null && readMethod.getReturnType() != Boolean.class && readMethod.getReturnType() != boolean.class) {
+                readMethod = null;
+            }
+        }
+
         if(readMethod == null) {
             throw new IllegalStateException("TraitPropertyAccessStrategy used on property ["+propertyName+"] of class ["+containerJavaType.getName()+"] that is not provided by a trait!");
         }