app: avoid mutex contention on queue related code
app: avoid mutex contention on queue related code

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