Send project name with Gitaly repository requests (EE port)

Stan Hurequested to merge
sh-log-project-name-with-gitaly-ee into master

When hashed storage is in use, it's helpful to have the project name associated with the request.

Closes gitaly#1394 (closed)

CE port: https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/23373

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