RFR 8170618: jmod should validate if any exported or open package is missing

[Mandy Chung]

> On Dec 21, 2016, at 4:08 AM, Sundararajan Athijegannathan <sundararajan.athijegannathan at oracle.com> wrote:
> 
> Please review http://cr.openjdk.java.net/~sundar/8170618/webrev.00/ for https://bugs.openjdk.java.net/browse/JDK-8170618

thanks for fixing this Sundar.

Minor comment on the test: the bug id's already listed in @bug.  You
can take out the bug id from line 117.  line 132 should be broken into
multiple lines.

Otherwise, looks good.
Mandy