RFR: 8354826: Make ResolverConfigurationImpl.lock field final

[Andrey Turbanov]

It was made `final` in Windows version of `ResolverConfigurationImpl` under [JDK-8287104](https://bugs.openjdk.java.net/browse/JDK-8287104).

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

Commit messages:
 - [PATCH] Make ResolverConfigurationImpl.lock field final

Changes: https://git.openjdk.org/jdk/pull/14955/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=14955&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8354826
  Stats: 2 lines in 1 file changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/14955.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/14955/head:pull/14955

PR: https://git.openjdk.org/jdk/pull/14955