feat: prometheus-exporter_clamav

[hugueslepesant]

Draft to create detector based on metrics coming from Clamav Prometheus Exporter

[haedri]

Could you fix the issue ? it happens when building from a fork

 module "signalfx-detectors-prometheus-exporter-clamav" {
-  source = "github.com/hugueslepesant/terraform-signalfx-detectors.git//modules/prometheus-exporter_clamav?ref={revision}"
+  source = "github.com/claranet/terraform-signalfx-detectors.git//modules/prometheus-exporter_clamav?ref={revision}"

Just changing it manually so that check are corrected