A set of fixes for the GET alert and groups endpoints.
- First, is the fact that the default values where not being for the query params. I've introduced a new method in the Grafana context that allow us to do this.
- Second, is the fact that alerts were never being transitioned to active. To my surprise this is actually done by the inhibitor in the pipeline - if an alert is not muted, or inhibited then it's active.
- Third, I have added an integration test to cover for regressions.
Signed-off-by: Josue Abreu <josue@grafana.com>
