RFR: Special domain OpenJDK Contributors is is openjdk.org

[Erik Duveblad via github.com]

Hi all,

as part of the last re-coversion the special domain used to recognize OpenJDK Contributors changed from openjdk.java.net to openjdk.org. This patch updates the backwards compatible interpretation of .jcheck/conf to use openjdk.org correctly.

## Testing
- [x] `sh gradlew test` passes on Linux x86_64

Thanks,
Erik

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

Commits:
 - 33728f2b:	Default domain for the jdk repo is openjdk.org

Pull request:
https://git.openjdk.java.net/skara/pull/85

Webrev:
https://webrevs.openjdk.java.net/skara/85/webrev.00

Patch:
https://git.openjdk.java.net/skara/pull/85.diff

Fetch command:
git fetch https://git.openjdk.java.net/skara pull/85/head:pull/85