RFR: 8316464: 3 sun/tools tests ignore VM flags [v2]

[Leonid Mesnik]

> I marked tests 
> sun/tools/jcmd/TestProcessHelper.java
> sun/tools/jinfo/JInfoTest.java
> as headless. They used different specific VM options and are not worth executing with other VM flags. 
> And fixed 
> sun/tools/jstat/JStatInterval.java
> Tested with tier1, local execution of tests, and running sun/tools/jstat/JStatInterval.java with different options.

Leonid Mesnik has updated the pull request incrementally with one additional commit since the last revision:

  fixed JInfoTest.java

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/16078/files
  - new: https://git.openjdk.org/jdk/pull/16078/files/b7c93f79..151578f8

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=16078&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=16078&range=00-01

  Stats: 7 lines in 1 file changed: 0 ins; 3 del; 4 mod
  Patch: https://git.openjdk.org/jdk/pull/16078.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/16078/head:pull/16078

PR: https://git.openjdk.org/jdk/pull/16078