db/dbtest: func to clear all collections except specified ones
db/dbtest: func to clear all collections except specified ones

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