hg: jigsaw/jake/jdk: Improve handling of non existent file on module path

[alan.bateman at oracle.com]

Changeset: 3d0b11562a9f
Author:    alanb
Date:      2016-02-14 08:53 +0000
URL:       http://hg.openjdk.java.net/jigsaw/jake/jdk/rev/3d0b11562a9f

Improve handling of non existent file on module path

! src/java.base/share/classes/java/lang/module/ModuleFinder.java
! src/java.base/share/classes/java/lang/module/ModulePath.java
! test/jdk/jigsaw/launcher/basic/BasicTest.java
! test/jdk/jigsaw/launcher/upgrademodulepath/UpgradeModulePathTest.java
! test/jdk/jigsaw/module/ModuleFinderTest.java