Resolve "[Geo] Log JID for sync related jobs"

What does this MR do?

We now have logs like this {"severity":"INFO","time":"2018-03-17T11:09:38.997Z","class":"Geo::RepositorySyncService","project_id":9,"project_path":"root/test-repo-with-no-wiki","message":"Started repository sync","job_id":"5b9b108c7558fe3c32cc61a5"

Are there points in the code the reviewer needs to double check?

Why was this MR needed?

Screenshots (if relevant)

Does this MR meet the acceptance criteria?

• Changelog entry added, if necessary
• Documentation created/updated
• API support added
• Tests added for this feature/bug
• Review
  • Has been reviewed by UX
  • Has been reviewed by Frontend
  • Has been reviewed by Backend
  • Has been reviewed by Database
• Conform by the merge request performance guides
• Conform by the style guides
• Squashed related commits together
• Internationalization required/considered
• If paid feature, have we considered GitLab.com plan and how it works for groups and is there a design for promoting it to users who aren't on the correct plan
• End-to-end tests pass (package-qa manual pipeline job)

What are the relevant issue numbers?

Closes #4994 (closed) related https://gitlab.com/gitlab-org/gitlab-ee/issues/5385#note_64472062