hg: code-tools/jtreg: 7901596: Add ability to marked a test as "skipped"

[jonathan.gibbons at oracle.com]

Changeset: c89dac862717
Author:    iignatyev
Date:      2018-07-16 17:10 -0700
URL:       http://hg.openjdk.java.net/code-tools/jtreg/rev/c89dac862717

7901596: Add ability to marked a test as "skipped"

! src/share/classes/com/sun/javatest/regtest/agent/MainActionHelper.java
! src/share/classes/com/sun/javatest/regtest/agent/MainWrapper.java
! src/share/classes/com/sun/javatest/regtest/exec/MainAction.java
+ test/skip/SkippedException.java
+ test/skip/SkippedExceptionTest.gmk
+ test/skip/TEST.ROOT
+ test/skip/TestKnownSkippedException.java
+ test/skip/TestUnknownJtregSkippedException.java
+ test/skip/TestUnknownSkippedException.java
+ test/skip/jtreg/SkippedException.java
+ test/skip/jtreg/SkippedException2.java