Fix broken Gitaly integration tests
Gitaly started to require Repository
information for certain commands like upload-pack, upload-archive, and receive-pack: gitaly@6b32a64b.
However, gitlab-shell tests are sending git_object_directory
and git_alternate_object_directories
that do not exist.
To fix the tests, we set those to an existing directory in the created repository.
Related to !693 (comment 1166683308) and Slack thread (internal).
Edited by Patrick Bajao