git: openjdk/skara: forge: support project id for GitLab repos

[Erik Helin]

Changeset: f5b20e32
Author:    Erik Helin <ehelin at openjdk.org>
Date:      2020-04-09 08:03:23 +0000
URL:       https://git.openjdk.java.net/skara/commit/f5b20e32

forge: support project id for GitLab repos

Reviewed-by: rwestberg

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