Imports
- github.com/pkg/errors
- github.com/elastic/beats/metricbeat/schema/mapstrstr
- github.com/elastic/beats/metricbeat/module/postgresql
- github.com/elastic/beats/metricbeat/schema
- github.com/lib/pq
- github.com/elastic/beats/libbeat/common
- github.com/elastic/beats/metricbeat/mb