provision/docker: Refactoring how to choose nodes in scheduler
provision/docker: Refactoring how to choose nodes in scheduler

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