RFR 8176195/9, Fix misc module dependencies in jdk_core tests

[Felix Yang]

Hi there,

   please review the changes to explicitly declare dependencies in 
tests. This will make better test selection with --limit-module option.

Bug:

    https://bugs.openjdk.java.net/browse/JDK-8176195

Webrev:

    http://cr.openjdk.java.net/~xiaofeya/8176195/webrev.00/

I didn't use TEST.properties to declare dependency with jdk.charsets in 
jdk_nio tests, because there are still lots of tests in the same folder 
not depending it.

Thanks,

Felix