Fix the committed/author names for the automatic commits

Due to https://gitlab.com/gitlab-org/gitlab-runner/issues/1809, GitLab only partially resolves variables defined by expanding other variables.

This means that all the generated commit currently are owned by a literal ${GITLAB_USER_NAME}.

This change fixes a regression introduced in the MR !41 (merged).

Signed-off-by: Andrej Shadura andrew.shadura@collabora.co.uk