Fix exporting assessments when using a filter
Fix exporting assessments when using a filter

# Conflicts:
#	src/ggrc/models/assessment.py

andrei-karalionak/ggrc-core,andrei-karalionak/ggrc-core,AleksNeStu/ggrc-core,VinnieJohns/ggrc-core,edofic/ggrc-core,j0gurt/ggrc-core,selahssea/ggrc-core,josthkko/ggrc-core,VinnieJohns/ggrc-core,kr41/ggrc-core,AleksNeStu/ggrc-core,AleksNeStu/ggrc-core,VinnieJohns/ggrc-core,NejcZupec/ggrc-core,selahssea/ggrc-core,edofic/ggrc-core,AleksNeStu/ggrc-core,VinnieJohns/ggrc-core,NejcZupec/ggrc-core,andrei-karalionak/ggrc-core,josthkko/ggrc-core,kr41/ggrc-core,andrei-karalionak/ggrc-core,selahssea/ggrc-core,edofic/ggrc-core,plamut/ggrc-core,plamut/ggrc-core,j0gurt/ggrc-core,selahssea/ggrc-core,j0gurt/ggrc-core,kr41/ggrc-core,josthkko/ggrc-core,NejcZupec/ggrc-core,edofic/ggrc-core,plamut/ggrc-core,josthkko/ggrc-core,kr41/ggrc-core,plamut/ggrc-core,j0gurt/ggrc-core,NejcZupec/ggrc-core