RFR: 1995: The logic for getting repository name and branch name in the backport pr command is inconsistent [v3]

[Zhao Song]

> In the backport pull request command, the process of getting the repository name and branch name differs between cancelling a backport request and creating a backport request. 
> 
> In this patch, I made the logic consistent.

Zhao Song has updated the pull request incrementally with one additional commit since the last revision:

  fix import

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

Changes:
  - all: https://git.openjdk.org/skara/pull/1545/files
  - new: https://git.openjdk.org/skara/pull/1545/files/182fb51f..0a4bfa3e

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=skara&pr=1545&range=02
 - incr: https://webrevs.openjdk.org/?repo=skara&pr=1545&range=01-02

  Stats: 1 line in 1 file changed: 0 ins; 1 del; 0 mod
  Patch: https://git.openjdk.org/skara/pull/1545.diff
  Fetch: git fetch https://git.openjdk.org/skara.git pull/1545/head:pull/1545

PR: https://git.openjdk.org/skara/pull/1545