test: Pull docker scratch image up front.
test: Pull docker scratch image up front.

This appears to fix races within docker that otherwise make CI rather painful to set up.

Signed-off-by: Eric Myhre <96f164ad4d9b2b0dacf8ebee2bb1eeb3aa69adf1@flynn.io>

GrimDerp/flynn,lmars/flynn,tonicbupt/flynn,jzila/flynn,lmars/flynn,benbjohnson/flynn,TribeMedia/flynn,ozum/flynn,schatt/flynn,ozum/flynn,supermario/flynn,ozum/flynn,schatt/flynn,kgrz/flynn,pkdevbox/flynn,supermario/flynn,arekkas/flynn,jzila/flynn,GrimDerp/flynn,technosophos/flynn,justintung/flynn,felixrieseberg/flynn,Brandywine2161/flynn,GrimDerp/flynn,supermario/flynn,flynn/flynn,tonicbupt/flynn,rikur/flynn,philiplb/flynn,shads196770/flynn,lmars/flynn,philiplb/flynn,technosophos/flynn,whouses/flynn,whouses/flynn,clifff/flynn,tonicbupt/flynn,TribeMedia/flynn,clifff/flynn,felixrieseberg/flynn,felixrieseberg/flynn,philiplb/flynn,arekkas/flynn,Brandywine2161/flynn,josephglanville/flynn,tonicbupt/flynn,tonicbupt/flynn,shads196770/flynn,supermario/flynn,josephglanville/flynn,arekkas/flynn,GrimDerp/flynn,ozum/flynn,ozum/flynn,kgrz/flynn,jzila/flynn,GrimDerp/flynn,schatt/flynn,pkdevbox/flynn,technosophos/flynn,supermario/flynn,justintung/flynn,josephglanville/flynn,Brandywine2161/flynn,josephglanville/flynn,shads196770/flynn,kgrz/flynn,technosophos/flynn,rikur/flynn,justintung/flynn,shads196770/flynn,justintung/flynn,technosophos/flynn,felixrieseberg/flynn,clifff/flynn,pkdevbox/flynn,josephglanville/flynn,lmars/flynn,TribeMedia/flynn,Brandywine2161/flynn,kgrz/flynn,TribeMedia/flynn,benbjohnson/flynn,whouses/flynn,pkdevbox/flynn,philiplb/flynn,shads196770/flynn,flynn/flynn,arekkas/flynn,TribeMedia/flynn,clifff/flynn,ozum/flynn,justintung/flynn,rikur/flynn,felixrieseberg/flynn,Brandywine2161/flynn,schatt/flynn,pkdevbox/flynn,schatt/flynn,Brandywine2161/flynn,justintung/flynn,clifff/flynn,arekkas/flynn,TribeMedia/flynn,shads196770/flynn,GrimDerp/flynn,flynn/flynn,benbjohnson/flynn,philiplb/flynn,rikur/flynn,rikur/flynn,rikur/flynn,whouses/flynn,whouses/flynn,flynn/flynn,whouses/flynn,flynn/flynn,supermario/flynn,kgrz/flynn,kgrz/flynn,benbjohnson/flynn,clifff/flynn,jzila/flynn,jzila/flynn,jzila/flynn,schatt/flynn,benbjohnson/flynn,benbjohnson/flynn,lmars/flynn,pkdevbox/flynn,josephglanville/flynn