review for minor changes to build.gradle

[David Hill]

Kevin,
     a couple of proposed changes to build.gradle.

Diffs are inline in the bugs.

Provide for extra jvm arguments for gradle test task
https://bugs.openjdk.java.net/browse/JDK-8155831

Allow disabling :web:test
https://bugs.openjdk.java.net/browse/JDK-8155832

-- 
David Hill<David.Hill at Oracle.com>
Java Embedded Development

"A man's feet should be planted in his country, but his eyes should survey the world."
-- George Santayana (1863 - 1952)