hg: jigsaw/jake/jdk: Add tests to verify installed module descriptors generated by plugins

[mandy.chung at oracle.com]

Changeset: d0475a6e142d
Author:    mchung
Date:      2016-02-05 17:31 -0800
URL:       http://hg.openjdk.java.net/jigsaw/jake/jdk/rev/d0475a6e142d

Add tests to verify installed module descriptors generated by plugins

+ test/jdk/jigsaw/tools/jlink/plugins/InstalledModuleDescriptors/InstalledModulesTest.java
! test/jdk/jigsaw/tools/jlink/plugins/InstalledModuleDescriptors/UserModuleTest.java
+ test/jdk/jigsaw/tools/jlink/plugins/InstalledModuleDescriptors/src/m2/module-info.java
+ test/jdk/jigsaw/tools/jlink/plugins/InstalledModuleDescriptors/src/m2/q/S1.java
+ test/jdk/jigsaw/tools/jlink/plugins/InstalledModuleDescriptors/src/m2/q/S2.java
+ test/jdk/jigsaw/tools/jlink/plugins/InstalledModuleDescriptors/src/m3/module-info.java