adding mongoDB service to Travis
adding mongoDB service to Travis

dhardy92/thumbor,gi11es/thumbor,BetterCollective/thumbor,jdunaravich/thumbor,wking/thumbor,voxmedia/thumbor,okor/thumbor,fanhero/thumbor,BetterCollective/thumbor,adeboisanger/thumbor,thumbor/thumbor,raphaelfruneaux/thumbor,camargoanderso/thumbor,scorphus/thumbor,voxmedia/thumbor,gselva/thumbor,jiangzhonghui/thumbor,2947721120/thumbor,food52/thumbor,aaxx/thumbor,grevutiu-gabriel/thumbor,abaldwin1/thumbor,abaldwin1/thumbor,figarocms/thumbor,abaldwin1/thumbor,camargoanderso/thumbor,raphaelfruneaux/thumbor,aaxx/thumbor,felipemorais/thumbor,davduran/thumbor,camargoanderso/thumbor,kkopachev/thumbor,thumbor/thumbor,kkopachev/thumbor,suwaji/thumbor,felipemorais/thumbor,lfalcao/thumbor,aaxx/thumbor,suwaji/thumbor,scorphus/thumbor,fanhero/thumbor,raphaelfruneaux/thumbor,adeboisanger/thumbor,lfalcao/thumbor,Bladrak/thumbor,lfalcao/thumbor,wking/thumbor,gselva/thumbor,marcelometal/thumbor,aaxx/thumbor,grevutiu-gabriel/thumbor,marcelometal/thumbor,Jimdo/thumbor,figarocms/thumbor,gselva/thumbor,figarocms/thumbor,thumbor/thumbor,jiangzhonghui/thumbor,davduran/thumbor,felipemorais/thumbor,food52/thumbor,scorphus/thumbor,gi11es/thumbor,food52/thumbor,MaTriXy/thumbor,camargoanderso/thumbor,felipemorais/thumbor,okor/thumbor,grevutiu-gabriel/thumbor,dhardy92/thumbor,marcelometal/thumbor,voxmedia/thumbor,thumbor/thumbor,MaTriXy/thumbor,2947721120/thumbor,Jimdo/thumbor,fanhero/thumbor,wking/thumbor,kkopachev/thumbor,lfalcao/thumbor,gi11es/thumbor,gselva/thumbor,kkopachev/thumbor,grevutiu-gabriel/thumbor,adeboisanger/thumbor,2947721120/thumbor,davduran/thumbor,Bladrak/thumbor,food52/thumbor,raphaelfruneaux/thumbor,wking/thumbor,suwaji/thumbor,jdunaravich/thumbor,BetterCollective/thumbor,adeboisanger/thumbor,suwaji/thumbor,MaTriXy/thumbor,Jimdo/thumbor,jdunaravich/thumbor,figarocms/thumbor,scorphus/thumbor,jiangzhonghui/thumbor,abaldwin1/thumbor,2947721120/thumbor,dhardy92/thumbor,Jimdo/thumbor,MaTriXy/thumbor,jiangzhonghui/thumbor,davduran/thumbor,okor/thumbor,jdunaravich/thumbor,fanhero/thumbor