Fix memcache issue with assessment generation
Fix memcache issue with assessment generation

Fixes issues: 1.90/1.385. They are about cache with people doesn't
update when new assessment generates.

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