Implement operational Monitoring

[asiday]

Changes:

• Create new prometheus file
• Add /health, /metrics, /prometheus endpoints to the marketplace app. Find them under https://localhost:8443/actuator
• Add Grafana to configuration file. Reachable under Host port 3000.
• Add micrometer
• Add counter when visiting the topic with specific ID. See under https://localhost:8443/topics/{topicID}
• Create new configuration file for timed metric
• Add prometheus and grafana service as monitoring profile
• Add unit tests for metrics

Close #173