Add api_helper for testing
Add api_helper for testing

Helper file used for testing the aplications api calls. It supports put
post, get and delete requests. It returns the server response object
with added json field if data contains the valid json.

hasanalom/ggrc-core,uskudnik/ggrc-core,plamut/ggrc-core,AleksNeStu/ggrc-core,hasanalom/ggrc-core,prasannav7/ggrc-core,uskudnik/ggrc-core,j0gurt/ggrc-core,edofic/ggrc-core,selahssea/ggrc-core,j0gurt/ggrc-core,AleksNeStu/ggrc-core,vladan-m/ggrc-core,selahssea/ggrc-core,hyperNURb/ggrc-core,NejcZupec/ggrc-core,hasanalom/ggrc-core,prasannav7/ggrc-core,jmakov/ggrc-core,prasannav7/ggrc-core,VinnieJohns/ggrc-core,hyperNURb/ggrc-core,j0gurt/ggrc-core,kr41/ggrc-core,uskudnik/ggrc-core,andrei-karalionak/ggrc-core,vladan-m/ggrc-core,plamut/ggrc-core,edofic/ggrc-core,josthkko/ggrc-core,VinnieJohns/ggrc-core,uskudnik/ggrc-core,VinnieJohns/ggrc-core,prasannav7/ggrc-core,selahssea/ggrc-core,uskudnik/ggrc-core,j0gurt/ggrc-core,jmakov/ggrc-core,andrei-karalionak/ggrc-core,josthkko/ggrc-core,kr41/ggrc-core,hasanalom/ggrc-core,kr41/ggrc-core,plamut/ggrc-core,andrei-karalionak/ggrc-core,AleksNeStu/ggrc-core,josthkko/ggrc-core,hasanalom/ggrc-core,jmakov/ggrc-core,NejcZupec/ggrc-core,NejcZupec/ggrc-core,hyperNURb/ggrc-core,hyperNURb/ggrc-core,hyperNURb/ggrc-core,VinnieJohns/ggrc-core,kr41/ggrc-core,plamut/ggrc-core,edofic/ggrc-core,vladan-m/ggrc-core,jmakov/ggrc-core,vladan-m/ggrc-core,NejcZupec/ggrc-core,selahssea/ggrc-core,jmakov/ggrc-core,andrei-karalionak/ggrc-core,edofic/ggrc-core,josthkko/ggrc-core,vladan-m/ggrc-core,AleksNeStu/ggrc-core