RFR: 1843: mlbridge bot bridge emails generated by itself.

[Guoxiong Li]

Hi all,

This patch filters both `github.com` (by `authenticatedUrl()`) and `git.openjdk.com` (by `url()`) in `MailingListArchiveReaderBot::inspect` to avoid the bot posting the unnecessary comments to the PRs. Please see SKARA-1843 [1] for more information.

But I can't write a test case for it now, because the current URLs of the repositories in test code are fake and their host are empty, which means both `pr.repository().url().getHost()` and `pr.repository().authenticatedUrl().getHost()` always return `null`.

Thanks for the review.

Best Regards,
-- Guoxiong

[1] https://bugs.openjdk.org/browse/SKARA-1843

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Commit messages:
 - SKARA-1843

Changes: https://git.openjdk.org/skara/pull/1485/files
 Webrev: https://webrevs.openjdk.org/?repo=skara&pr=1485&range=00
  Issue: https://bugs.openjdk.org/browse/SKARA-1843
  Stats: 2 lines in 1 file changed: 1 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/skara/pull/1485.diff
  Fetch: git fetch https://git.openjdk.org/skara.git pull/1485/head:pull/1485

PR: https://git.openjdk.org/skara/pull/1485