hg: code-tools/jtreg: RegressionParameters should use defensive copies of inbound collections and return unmodifiable collections

[jonathan.gibbons at oracle.com]

Changeset: 79705dae19e7
Author:    jjg
Date:      2015-05-26 15:37 -0700
URL:       http://hg.openjdk.java.net/code-tools/jtreg/rev/79705dae19e7

RegressionParameters should use defensive copies of inbound collections and return unmodifiable collections

! src/share/classes/com/sun/javatest/regtest/RegressionParameters.java