bots: Fix ostree remote URL on Atomic
bots: Fix ostree remote URL on Atomic

There was an extra `/` in the "local" remote URL which is now illegal in
Fedora 28:
```
file:////var/local-repo
error: [3] URL using bad/illegal format or missing URL
```

moraleslazaro/cockpit,stefwalter/cockpit,stefwalter/cockpit,martinpitt/cockpit,moraleslazaro/cockpit,deryni/cockpit,garrett/cockpit,cockpit-project/cockpit,moraleslazaro/cockpit,SotolitoLabs/cockpit,moraleslazaro/cockpit,mareklibra/cockpit,martinpitt/cockpit,andreasn/cockpit,garrett/cockpit,cockpit-project/cockpit,SotolitoLabs/cockpit,SotolitoLabs/cockpit,andreasn/cockpit,SotolitoLabs/cockpit,cockpituous/cockpit,mvollmer/cockpit,cockpituous/cockpit,moraleslazaro/cockpit,moraleslazaro/cockpit,martinpitt/cockpit,deryni/cockpit,stefwalter/cockpit,andreasn/cockpit,cockpituous/cockpit,mareklibra/cockpit,deryni/cockpit,deryni/cockpit,mvollmer/cockpit,martinpitt/cockpit,garrett/cockpit,garrett/cockpit,cockpituous/cockpit,SotolitoLabs/cockpit,stefwalter/cockpit,mareklibra/cockpit,cockpit-project/cockpit,mvollmer/cockpit,andreasn/cockpit,cockpituous/cockpit,deryni/cockpit,martinpitt/cockpit,deryni/cockpit,mareklibra/cockpit,cockpit-project/cockpit,mvollmer/cockpit,mareklibra/cockpit,mareklibra/cockpit,stefwalter/cockpit,SotolitoLabs/cockpit,stefwalter/cockpit,deryni/cockpit,cockpit-project/cockpit,mareklibra/cockpit,stefwalter/cockpit,cockpituous/cockpit,andreasn/cockpit,SotolitoLabs/cockpit,garrett/cockpit,mvollmer/cockpit,andreasn/cockpit,andreasn/cockpit,moraleslazaro/cockpit