hg: code-tools/jtreg: 7902090: Update JDK_Version to be more future-proof

[jonathan.gibbons at oracle.com]

Changeset: 34702ed26bcd
Author:    jjg
Date:      2018-02-05 17:03 -0800
URL:       http://hg.openjdk.java.net/code-tools/jtreg/rev/34702ed26bcd

7902090: Update JDK_Version to be more future-proof

! src/share/classes/com/sun/javatest/regtest/agent/JDK_Version.java
! src/share/classes/com/sun/javatest/regtest/config/RegressionContext.java
! src/share/classes/com/sun/javatest/regtest/tool/Tool.java