RFR: 2266: TestInfoBot couldn't get checks after user changed their GitHub username [v3]

[Zhao Song]

> TestInfoBot couldn't get checks after user changed their GitHub username, the root cause is that Skara bot can't correctly handle HTTP status code 301 in rest requests. 
> This patch is trying to make skara bot follows the redirect link when it encounters 301 status code.

Zhao Song has updated the pull request incrementally with two additional commits since the last revision:

 - update
 - update

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

Changes:
  - all: https://git.openjdk.org/skara/pull/1652/files
  - new: https://git.openjdk.org/skara/pull/1652/files/170496ed..5c46a26a

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=skara&pr=1652&range=02
 - incr: https://webrevs.openjdk.org/?repo=skara&pr=1652&range=01-02

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/skara/pull/1652.diff
  Fetch: git fetch https://git.openjdk.org/skara.git pull/1652/head:pull/1652

PR: https://git.openjdk.org/skara/pull/1652