gitlab-ci: restore bot pipeline behavior

For cki-ark-bot, the triggered MR pipelines are supposed to only build the SRPM in the various build roots.

This got broken a while ago, most likely when kernel-ark was switched to merge-result pipelines.

The previous implementation checked the git commit author, which doesn't work for merged-result pipelines as the merge commit is generated by GitLab. Switch that to check the name of the user who started the MR pipeline, which should work in all cases.

Fixes #163 (closed)

Signed-off-by: Michael Hofmann mhofmann@redhat.com