api/service_provision: return 409 instead of 500 on duplicate service name
api/service_provision: return 409 instead of 500 on duplicate service
name

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