HAProxy: gauge missing statuses with zero
Remove unused imports and statuses
Bugfix: update is for ==
Update haproxy events title
Add open to available statuses
HAPROXY Process events and host metrics only for needed services
Remove HAProxy from event's title
Update haproxy test
Merge pull request #940 from DataDog/tristan/haproxy-count-per-status

HAProxy: gauge missing statuses with zero