Public API: add behave tests for returning an error on invalid request params
Public API: add behave tests for returning an error on invalid request params

SD-2171

marwoodandrew/superdesk-aap,ioanpocol/superdesk,Aca-jov/superdesk,gbbr/superdesk,petrjasek/superdesk,ancafarcas/superdesk,gbbr/superdesk,petrjasek/superdesk-ntb,pavlovicnemanja92/superdesk,amagdas/superdesk,akintolga/superdesk-aap,verifiedpixel/superdesk,marwoodandrew/superdesk,akintolga/superdesk,vied12/superdesk,mugurrus/superdesk,mdhaman/superdesk-aap,superdesk/superdesk-ntb,akintolga/superdesk,akintolga/superdesk,darconny/superdesk,marwoodandrew/superdesk-aap,vied12/superdesk,pavlovicnemanja92/superdesk,ioanpocol/superdesk-ntb,plamut/superdesk,hlmnrmr/superdesk,petrjasek/superdesk-ntb,vied12/superdesk,plamut/superdesk,superdesk/superdesk,akintolga/superdesk,sjunaid/superdesk,mdhaman/superdesk,darconny/superdesk,superdesk/superdesk-aap,pavlovicnemanja/superdesk,pavlovicnemanja/superdesk,fritzSF/superdesk,sivakuna-aap/superdesk,petrjasek/superdesk-ntb,akintolga/superdesk-aap,mdhaman/superdesk-aap,fritzSF/superdesk,mdhaman/superdesk-aap,plamut/superdesk,plamut/superdesk,sivakuna-aap/superdesk,hlmnrmr/superdesk,verifiedpixel/superdesk,mdhaman/superdesk-aap,fritzSF/superdesk,amagdas/superdesk,marwoodandrew/superdesk-aap,ancafarcas/superdesk,akintolga/superdesk-aap,superdesk/superdesk,verifiedpixel/superdesk,hlmnrmr/superdesk,superdesk/superdesk-ntb,ioanpocol/superdesk-ntb,superdesk/superdesk-ntb,thnkloud9/superdesk,superdesk/superdesk-ntb,ioanpocol/superdesk,verifiedpixel/superdesk,superdesk/superdesk-aap,gbbr/superdesk,sivakuna-aap/superdesk,superdesk/superdesk,sivakuna-aap/superdesk,darconny/superdesk,liveblog/superdesk,liveblog/superdesk,pavlovicnemanja/superdesk,akintolga/superdesk,verifiedpixel/superdesk,fritzSF/superdesk,pavlovicnemanja92/superdesk,thnkloud9/superdesk,marwoodandrew/superdesk,superdesk/superdesk-aap,akintolga/superdesk-aap,mdhaman/superdesk,plamut/superdesk,fritzSF/superdesk,marwoodandrew/superdesk,superdesk/superdesk-aap,superdesk/superdesk,petrjasek/superdesk,sivakuna-aap/superdesk,ioanpocol/superdesk,pavlovicnemanja/superdesk,ioanpocol/superdesk-ntb,amagdas/superdesk,amagdas/superdesk,marwoodandrew/superdesk-aap,mugurrus/superdesk,petrjasek/superdesk-ntb,petrjasek/superdesk,vied12/superdesk,vied12/superdesk,mugurrus/superdesk,Aca-jov/superdesk,mdhaman/superdesk,marwoodandrew/superdesk,liveblog/superdesk,amagdas/superdesk,ancafarcas/superdesk,liveblog/superdesk,sjunaid/superdesk,Aca-jov/superdesk,pavlovicnemanja92/superdesk,pavlovicnemanja92/superdesk,liveblog/superdesk,thnkloud9/superdesk,petrjasek/superdesk,sjunaid/superdesk,marwoodandrew/superdesk