hg: code-tools/jtreg: fix/improve handling of duplicate ids

[jonathan.gibbons at oracle.com]

Changeset: 8c0fe3352a9a
Author:    jjg
Date:      2019-11-26 13:34 -0800
URL:       https://hg.openjdk.java.net/code-tools/jtreg/rev/8c0fe3352a9a

fix/improve handling of duplicate ids

! src/share/classes/com/sun/javatest/regtest/config/RegressionTestFinder.java
! src/share/classes/com/sun/javatest/regtest/config/i18n.properties
! test/explicitIds/ExplicitIds.gmk
! test/explicitIds/Test.java