hg: jdk9/hs/hotspot: 8172288: Fix Jigsaw related module/package error messages and throw correct exceptions

[harold.seigel at oracle.com]

Changeset: ebcd23d638c4
Author:    hseigel
Date:      2017-01-13 07:19 -0500
URL:       http://hg.openjdk.java.net/jdk9/hs/hotspot/rev/ebcd23d638c4

8172288: Fix Jigsaw related module/package error messages and throw correct exceptions
Summary: Reword error messages and throw IllegalStateExceptions where appropriate
Reviewed-by: alanb, acorn, lfoltan, gtriantafill

! src/share/vm/classfile/modules.cpp
! test/runtime/modules/JVMAddModulePackage.java
! test/runtime/modules/JVMDefineModule.java