RFR: JDK-8274930: sun/tools/jps/TestJps.java can fail with long VM arguments string

[Alex Menkov]

The fix adds "-XX:PerfMaxStringConstLength" argument running target app (default is 1024, 8K should be enough for any environments)

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Commit messages:
 - JDK-8274930

Changes: https://git.openjdk.java.net/jdk/pull/5858/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=5858&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8274930
  Stats: 2 lines in 1 file changed: 1 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk/pull/5858.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/5858/head:pull/5858

PR: https://git.openjdk.java.net/jdk/pull/5858