Bump tools/create_remote_build_server/roles/cloudalchemy.grafana from…

… `1b00549` to `a8a19e5` (#173)

Bumps [tools/create_remote_build_server/roles/cloudalchemy.grafana](https://github.com/cloudalchemy/ansible-grafana) from `1b00549` to `a8a19e5`.
- [Release notes](https://github.com/cloudalchemy/ansible-grafana/releases)
- [Commits](cloudalchemy/ansible-grafana@1b00549...a8a19e5)

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