queue: change Preempt so it copy the map
queue: change Preempt so it copy the map

It already used another reference for avoiding a dead lock, but there
was still a race.

gwmoura/tsuru,firebitsbr/tsuru,jblancett/tsuru,gciotta/tsuru,ggarnier/tsuru,cezarsa/tsuru,kgrvamsi/tsuru,tsuru/tsuru,firebitsbr/tsuru,guilhermebr/tsuru,hugoantunes/tsuru,ggarnier/tsuru,ggarnier/tsuru,Endika/tsuru,hcxiong/tsuru,guilhermebr/tsuru,4eek/tsuru,4eek/tsuru,guilhermebr/tsuru,tuxmonteiro/tsuru,ArxdSilva/tsuru,Endika/tsuru,tsuru/tsuru,cezarsa/tsuru,kgrvamsi/tsuru,4eek/tsuru,hcxiong/tsuru,ArxdSilva/tsuru,cgvarela/tsuru,gciotta/tsuru,jblancett/tsuru,ggarnier/tsuru,firebitsbr/tsuru,gwmoura/tsuru,RichardKnop/tsuru,cezarsa/tsuru,cgvarela/tsuru,gwmoura/tsuru,mderaldo/tsuru,hugoantunes/tsuru,jblancett/tsuru,mderaldo/tsuru,hcxiong/tsuru,ArxdSilva/tsuru,RichardKnop/tsuru,tuxmonteiro/tsuru,cezarsa/tsuru,cgvarela/tsuru,tsuru/tsuru,mderaldo/tsuru,kgrvamsi/tsuru,tsuru/tsuru,ArxdSilva/tsuru,gciotta/tsuru,RichardKnop/tsuru,tuxmonteiro/tsuru,Endika/tsuru,guilhermebr/tsuru