hg: jigsaw/jake: Switch jtreg to 4.2 b02

[alan . bateman]

Changeset: 216193d1f34d
Author:    alanb
Date:      2016-04-28 12:13 +0100
URL:       http://hg.openjdk.java.net/jigsaw/jake/rev/216193d1f34d

Switch jtreg to 4.2 b02

! common/conf/jib-profiles.js