RFR: 8276561: URL$DefaultFactory::PREFIX should be static final

[Michael McMahon]

Hi,

Could I get the following trivial code change reviewed please? Static analysis shows one 
static field declaration in java.net.URL that should be final.

Thanks,
Michael.

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

Commit messages:
 - add final keyword

Changes: https://git.openjdk.org/jdk/pull/9586/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=9586&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8276561
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/9586.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/9586/head:pull/9586

PR: https://git.openjdk.org/jdk/pull/9586