8211825: ModuleLayer.defineModulesWithXXX does not setup delegation when module reads automatic module

[Alan Bateman]

This is the issue that Thomas Watson brought up here on Friday. If
defineModulesWithXXX is used to create a module layer and it contains a
module that reads an automatic module mapped to a different class loader
(same layer or parent layer) then the class loader delegation isn't
setup.  This scenario requires special handling the module descriptor
for automatic modules don't declare any exports.

The changes to fix the issue are here:
  http://cr.openjdk.java.net/~alanb/8211825/webrev/index.html

Note that

-Alan

[Mandy Chung]

Post by Alan Bateman
This is the issue that Thomas Watson brought up here on Friday. If
defineModulesWithXXX is used to create a module layer and it contains
a module that reads an automatic module mapped to a different class
loader (same layer or parent layer) then the class loader delegation
isn't setup.  This scenario requires special handling the module
descriptor for automatic modules don't declare any exports.
  http://cr.openjdk.java.net/~alanb/8211825/webrev/index.html

This change looks good.

Mandy