Review Request: JDK-8179035: Include tool modules in unified docs

[Mandy Chung]

A few modules are missing in the unified docs such as jdk.jcmd, 
jdk.jdwp.agent, jdk.jstatd, etc.  Some tool modules are providers
and they were in the initial set.  The modules that are neither
a provider nor exporting any API package are missed in the initial
patch.

http://cr.openjdk.java.net/~mchung/jdk9/webrevs/8179035/webrev.00/

Mandy