RFR: JDK-8318961: increase javacserver connection timeout values and max retry attempts

[Matthias Baesken]

Increase javacserver connection timeout values and max retry attempts for better make stability on some slower machines.

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Commit messages:
 - JDK-8318961

Changes: https://git.openjdk.org/jdk/pull/16397/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=16397&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8318961
  Stats: 5 lines in 1 file changed: 0 ins; 0 del; 5 mod
  Patch: https://git.openjdk.org/jdk/pull/16397.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/16397/head:pull/16397

PR: https://git.openjdk.org/jdk/pull/16397