[Integrated] RFR: forge: use correct endpoint for GitLab branches

[Erik Helin]

Changeset: 6b271460
Author:    Erik Helin <ehelin at openjdk.org>
Date:      2020-04-09 06:22:01 +0000
URL:       https://git.openjdk.java.net/skara/commit/6b271460

forge: use correct endpoint for GitLab branches

Reviewed-by: rwestberg

! forge/src/main/java/org/openjdk/skara/forge/gitlab/GitLabRepository.java