Review request for JDK-8156575: Add jdeps -addmods, -system, -inverse options

[Mandy Chung]

Daniel,

I have added more tests and fixed a few issues
  http://cr.openjdk.java.net/~mchung/jdk9/webrevs/8156575/webrev.02/

I also created a test case similar to yours.  

This patch applies on top of:
  http://cr.openjdk.java.net/~mchung/jdk9/webrevs/8156680/webrev.02/

for JDK-8156680: jdeps implementation refresh

Thanks
Mandy