test: Fix testCluster.Size()
test: Fix testCluster.Size()

TestOmniJobs uses testCluster.Size() to determine how many jobs to wait
for, so it should not include hosts which have been removed.

Signed-off-by: Lewis Marshall <748e1641a368164906d4a0c0e3965345453dcc93@lmars.net>

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