hg: code-tools/jtreg: always generate --add-modules for all unique modules in @modules

[jonathan.gibbons at oracle.com]

Changeset: f79ef1ecc483
Author:    jjg
Date:      2016-12-01 17:17 -0800
URL:       http://hg.openjdk.java.net/code-tools/jtreg/rev/f79ef1ecc483

always generate --add-modules for all unique modules in @modules

! src/share/classes/com/sun/javatest/regtest/exec/Action.java
+ src/share/test/javatest/regtest/data/addmods/TEST.ROOT
+ src/share/test/javatest/regtest/data/addmods/TestNonDefaultCompiler.java
+ src/share/test/javatest/regtest/data/addmods/TestNonDefaultRuntime.java