hg: code-tools/jtreg: 7900211: empty groups not handled correctly

[jonathan.gibbons at oracle.com]

Changeset: 67e3e5c9a1f4
Author:    jjg
Date:      2013-08-08 18:46 -0700
URL:       http://hg.openjdk.java.net/code-tools/jtreg/rev/67e3e5c9a1f4

7900211: empty groups not handled correctly

! make/tests/GroupTest.gmk
! src/share/classes/com/sun/javatest/regtest/GroupManager.java
! src/share/test/javatest/regtest/data/groups/TEST.groups