DefaultMethodHandler to use the same class loader as the method`s dec…

[brohacz]

When using spring-boot-devtools, the application is using two class loaders: Classes that don’t change (for example, those from third-party jars) are loaded into a base classloader. Classes that are under development are loaded into a restart classloader.

DefaultMethodHandler is loaded by the base classloader while the user classes are loaded via restart classloader. When DefaultMethdHandler tries to load the user class (using base classloader) if cannot find it and it results in NoSuchMethodException:

Caused by: java.lang.NoSuchMethodException: com.model.MyEntity$DefaultImpls.toDomain(com.model.MyEntity, org.ktorm.database.Database)
	at java.base/java.lang.Class.getMethod(Class.java:2108)
	at org.ktorm.entity.DefaultMethodHandler$Companion.forMethod$lambda-0(DefaultMethodHandler.kt:119)
	at java.base/java.util.Map.computeIfAbsent(Map.java:1003)
	at java.base/java.util.Collections$SynchronizedMap.computeIfAbsent(Collections.java:2682)
	at org.ktorm.entity.DefaultMethodHandler$Companion.forMethod(DefaultMethodHandler.kt:113)
	at org.ktorm.entity.EntityImplementation.handleMethodCall(EntityImplementation.kt:94)
	at org.ktorm.entity.EntityImplementation.invoke(EntityImplementation.kt:67)
	... 165 more

PR to fix DefaultMethodHandler to load the class using the same classloader as method's declaring class.

[vincentlauvlwj]

Thank you.