DATACMNS-710 - ObjectInstantiatorClassGenerator now uses default class loader.

We're now using ClassUtils.getDefaultClassloader() to make sure we adhere to any class loading tricks the framework might impose for domain type instantiation.

src/main/java/org/springframework/data/convert/BytecodeGeneratingEntityInstantiator.java

@@ -284,7 +284,7 @@ public enum BytecodeGeneratingEntityInstantiator implements EntityInstantiator {
 
 			this.classLoader = AccessController.doPrivileged(new PrivilegedAction<ByteArrayClassLoader>() {
 				public ByteArrayClassLoader run() {
-					return new ByteArrayClassLoader(ObjectInstantiatorClassGenerator.class.getClassLoader());
+					return new ByteArrayClassLoader(ClassUtils.getDefaultClassLoader());
 				}
 			});
 		}