[native-image] Services declared in META-INF/services shouldn't require declaration in reflection.json

[graemerocher]

Currently you have to declare each class defined in a META-INF/services file and loaded via ServiceLoader in a reflection.json when using nativeimage.

This seems counter intuitive as the classes are already declared ahead of time. The nativeimage tool should scan the META-INF/services and include them automatically or there should be a flag to enable the ability to do this, otherwise every Java project has to write some build tool to extract all the META-INF/services classes and generate a reflection.json file.

Relates to #470

[vhiairrassary]

If you use constant argument for ServiceLoader.load(Class) then hopefully #566 should fix your issue?

[graemerocher]

Yes #566 looks like it will resolve it

[graemerocher]

This duplicates #563 sorry for the noise