RFR(XS): 8218947: jdb threads command should print threadID in decimal, not hex

[Chris Plummer]

Hi,

Please review the following:

http://cr.openjdk.java.net/~cjplummer/8218947/webrev
https://bugs.openjdk.java.net/browse/JDK-8218947

Tested by running the following on all supported platforms:

open/test/hotspot/jtreg/vmTestbase/nsk/jdb
open/test/jdk/com/sun/jdi

thanks,

Chris