<Swing Dev> RFR: 8199060: Test javax/swing/text/html/parser/Parser/6990651/bug6990651.java is unstable

[Sergey Bylokhov]

The test previously failed because of an error when jtreg tried to clean the state of the threads in agenvm mode.
Since then the client tests started to use othervm mode and the code in jtreg was updated as well by the
https://bugs.openjdk.java.net/browse/CODETOOLS-7902131

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

Commit messages:
 - Update ProblemList.txt

Changes: https://git.openjdk.java.net/jdk/pull/856/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=856&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8199060
  Stats: 1 line in 1 file changed: 0 ins; 1 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk/pull/856.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/856/head:pull/856

PR: https://git.openjdk.java.net/jdk/pull/856