Fix broken test which relied on DNS resolution #1962
Fix broken test which relied on DNS resolution #1962

Switched to testing by way of the static_configs rather than
dns_sd_config parameter.  Verified that the revised test both passes
without network access, and also still catches the bug it's supposed to
cover.

SaltedMan/prometheus-annotated,tomwilkie/prometheus,JavierZunzunegui/prometheus,amorken/prometheus,PrFalken/prometheus,sudhi-vm/prometheus,amorken/prometheus,keegancsmith/prometheus,GoogleCloudPlatform/prometheus,Gouthamve/prometheus,brancz/prometheus,AlekSi/prometheus,Colstuwjx/prometheus,prometheus/prometheus,Colstuwjx/prometheus,gottwald/prometheus,SaltedMan/prometheus-annotated,GoogleCloudPlatform/prometheus,Conorbro/prometheus,alileza/prometheus,JavierZunzunegui/prometheus,agaoglu/prometheus,dsymonds/prometheus,PrFalken/prometheus,Colstuwjx/prometheus,kangwoo/prometheus,tattsun/prometheus,brancz/prometheus,sudhi-vm/prometheus,yanghongkjxy/prometheus,keegancsmith/prometheus,adamron1/prometheus,dsymonds/prometheus,Conorbro/prometheus,SaltedMan/prometheus-annotated,kangwoo/prometheus,gottwald/prometheus,slok/prometheus,kzittritsch/prometheus,prometheus/prometheus,brancz/prometheus,ton31337/prometheus,agaoglu/prometheus,brancz/prometheus,prometheus/prometheus,prometheus/prometheus,ton31337/prometheus,keegancsmith/prometheus,ton31337/prometheus,ton31337/prometheus,Conorbro/prometheus,alileza/prometheus,prometheus/prometheus,sudhi-vm/prometheus,Stackdriver/stackdriver-prometheus,amorken/prometheus,Gouthamve/prometheus,dsymonds/prometheus,slok/prometheus,kangwoo/prometheus,keegancsmith/prometheus,sudhi-vm/prometheus,yanghongkjxy/prometheus,GoogleCloudPlatform/prometheus,tomwilkie/prometheus,SaltedMan/prometheus-annotated,keegancsmith/prometheus,alileza/prometheus,tattsun/prometheus,adamron1/prometheus,datajet-io/prometheus,datajet-io/prometheus,slok/prometheus,AlekSi/prometheus,agaoglu/prometheus,GoogleCloudPlatform/prometheus,yanghongkjxy/prometheus,JavierZunzunegui/prometheus,Stackdriver/stackdriver-prometheus,agaoglu/prometheus,gottwald/prometheus,Gouthamve/prometheus,JavierZunzunegui/prometheus,yanghongkjxy/prometheus,kzittritsch/prometheus,alileza/prometheus,tomwilkie/prometheus,datajet-io/prometheus,adamron1/prometheus,adamron1/prometheus,datajet-io/prometheus,Gouthamve/prometheus,AlekSi/prometheus,Stackdriver/stackdriver-prometheus,AlekSi/prometheus,Stackdriver/stackdriver-prometheus,kzittritsch/prometheus,dsymonds/prometheus,kzittritsch/prometheus,tattsun/prometheus,kangwoo/prometheus,amorken/prometheus,Conorbro/prometheus,tattsun/prometheus,PrFalken/prometheus,tomwilkie/prometheus,GoogleCloudPlatform/prometheus,slok/prometheus,alileza/prometheus,Colstuwjx/prometheus,gottwald/prometheus,PrFalken/prometheus