update taskreg test to use collective spawn calls
update taskreg test to use collective spawn calls

StanfordLegion/legion,sdalton1/legion,sdalton1/legion,chuckatkins/legion,chuckatkins/legion,StanfordLegion/legion,chuckatkins/legion,sdalton1/legion,sdalton1/legion,chuckatkins/legion,sdalton1/legion,StanfordLegion/legion,StanfordLegion/legion,chuckatkins/legion,StanfordLegion/legion,StanfordLegion/legion,chuckatkins/legion,chuckatkins/legion,StanfordLegion/legion,sdalton1/legion,StanfordLegion/legion