RFR 8202204: Rename hotspot runtime jtreg constantPool ConstantPool directories

[harold seigel]

Hi,

Please review this change to move the tests in directory 
open/test/hotspot/jtreg/runtime/constantPool/ to new directory 
open/test/hotspot/jtreg/runtime/AccModule/.  This removes directory 
open/test/hotspot/jtreg/runtime/constantPool/.  So, it is no longer in 
conflict with directory open/test/hotspot/jtreg/runtime/ConstantPool/.

JBS Bug:  https://bugs.openjdk.java.net/browse/JDK-8202204

Open Webrev: http://cr.openjdk.java.net/~hseigel/bug_8202204/webrev/

Please note that the changes to ConstModule.java shown at lines 50, 56, 
68, and 74 were made by an earlier push and are not part of this RFR.  
They do not show up when 'hg diff' is run.  It's unclear (to me) why 
webrev displays them.

The moved tests were tested on the four Mach5 platforms.

Thanks, Harold