Feature/add spring config

[benjaminkostiuk]

Overview

Adds spring cloud config client to the course-management microservice to support externalizing configuration. This will come in handy once we deploy to the cloud and need to manage configuration easily.

closes #6.

New config server microservice: https://github.com/puffproject/config-server New configuration repo for public config: https://github.com/puffproject/cloud-configuration

This change is a

• [ ] Bug fix
• [x] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that will change exisiting functionality)
• [ ] Documentation update

Description

• Add spring-cloud-starter-config dependency + spring-cloud-dependencies dependency manager. (Simplifies things for eureka later)
• Updates actuator endpoints to also include refresh: Allows to refresh configuration just by hitting an endpoint.
• Added the @RefreshScope annotation on Swagger config class. Annotation can be used anywhere updateable config values are injected.
• Added bootstrap.yml files to local spring cloud config details for connecting with the config server (bootstrap is loaded before application files)

Motivation/Links

This supports the DevOps principle of externalizing configuration in applications. With this we can securly pull configuration from the config server when deploying to the cloud. It also allows refreshing of the configuration on-the-fly instead of having to redeploy.

How was this tested?

Automated tests pass. Also manually tested connection between microservice & config server works. Automated intergration tests to follow.

Todos

• [x] Ensure unit tests pass
• [ ] Update documentation for changes (if necessary)
• [x] Delete stale branch after merge

[benjaminkostiuk]

Had to rebase to fix merge issues. Re-opened in #17