Report GCE instance metdata (#2084)
Report GCE instance metdata (#2084)

* Report GCE instance metdata

* Fix spelling acording to code review guidelines

* Address review comments

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