Alexandre Normand

Results 3 issues of Alexandre Normand

### What does this PR do? This PR aims to address confusion that comes up related to missing data due to the default `postgres` database being ignored. This updates the...

documentation
integration/postgres
changelog/Changed

### What does this PR do? This PR aims to address confusion that comes up related to inconsistent treatment the `ignore_databases` configuration: * Query samples/activity and core metrics honored the...

integration/postgres
changelog/Fixed

I was trying to use minimock last week and found that the generated mocks were failing staticcheck's [SA5011 - Possible nil pointer dereference](https://staticcheck.io/docs/checks/#SA5011). Example: ``` cacher_mock_test.go:1921:65: possible nil pointer dereference...