Make the post requirements file optional.
Make the post requirements file optional.

It is going to be removed from master with this pr: https://github.com/edx/edx-platform/pull/7465

beacloudgenius/configuration,lgfa29/configuration,leansoft/configuration,kencung/configuration,omarkhan/configuration,pobrejuanito/configuration,IndonesiaX/configuration,xiangjf/configuration,CredoReference/configuration,arbrandes/edx-configuration,Pieros/configuration,Stanford-Online/configuration,leansoft/configuration,nikolas/configuration,bugcy013/edx_infra,usernamenumber/configuration,jorgeomarmh/configuration,mitodl/configuration,kursitet/configuration,appsembler/configuration,Softmotions/configuration,nttks/configuration,openfun/configuration,edx/configuration,alu042/configuration,louyihua/configuration,Pieros/configuration,joshhu/configuration,arifsetiawan/configuration,michaelsteiner19/open-edx-configuration,CredoReference/configuration,alu042/configuration,pedrorib/istx,stvstnfrd/configuration,hks-epod/configuration,CredoReference/configuration,stvstnfrd/configuration,rue89-tech/configuration,proversity-org/configuration,antoviaque/configuration,IndonesiaX/configuration,omarkhan/configuration,pedrorib/istx,eduStack/configuration,armaan/edx-configuration,IndonesiaX/configuration,openfun/configuration,rue89-tech/configuration,alu042/configuration,eduStack/configuration,joshhu/configuration,jorgeomarmh/configuration,gashac03/ubuntu,open-craft/configuration,armaan/edx-configuration,michaelsteiner19/open-edx-configuration,glengal/configuration,edx/configuration,4eek/configuration,joshhu/configuration,open-craft/configuration,michaelsteiner19/open-edx-configuration,hks-epod/configuration,antoviaque/configuration,gashac03/ubuntu,fghaas/edx-configuration,antoviaque/configuration,hastexo/edx-configuration,jorgeomarmh/configuration,EDUlib/configuration,hastexo/edx-configuration,rue89-tech/configuration,4eek/configuration,nunpa/configuration,beacloudgenius/configuration,open-craft/configuration,jorgeomarmh/configuration,armaan/edx-configuration,pedrorib/istx,nunpa/configuration,xiangjf/configuration,beacloudgenius/configuration,fghaas/edx-configuration,antshin72/configuration,stvstnfrd/configuration,marcore/configuration,nttks/configuration,pobrejuanito/configuration,Stanford-Online/configuration,proversity-org/configuration,zhengjunwei/configuration,gashac03/ubuntu,EDUlib/configuration,joshhu/configuration,gsehub/configuration,louyihua/configuration,proversity-org/configuration,arifsetiawan/configuration,Carlos2005/configuration,appsembler/configuration,arifsetiawan/configuration,gsehub/configuration,fghaas/edx-configuration,appsembler/configuration,Pieros/configuration,vasyarv/configuration,edx/configuration,edx/configuration,armaan/edx-configuration,kursitet/configuration,usernamenumber/configuration,Softmotions/configuration,arbrandes/edx-configuration,zhengjunwei/configuration,kencung/configuration,antshin72/configuration,Pieros/configuration,bugcy013/edx_infra,nunpa/configuration,vasyarv/configuration,arbrandes/edx-configuration,pobrejuanito/configuration,knehez/configuration,marcore/configuration,AlfiyaZi/configuration,omarkhan/configuration,appsembler/configuration,xiangjf/configuration,open-craft/configuration,alu042/configuration,CredoReference/configuration,antshin72/configuration,arifsetiawan/configuration,louyihua/configuration,kursitet/configuration,Stanford-Online/configuration,beacloudgenius/configuration,fghaas/edx-configuration,stvstnfrd/configuration,hks-epod/configuration,glengal/configuration,lgfa29/configuration,AlfiyaZi/configuration,Carlos2005/configuration,nttks/configuration,openfun/configuration,Livit/Livit.Learn.EdX.configuration,hastexo/edx-configuration,gsehub/configuration,Stanford-Online/configuration,marcore/configuration,glengal/configuration,nikolas/configuration,mitodl/configuration,kencung/configuration,hastexo/edx-configuration-old,antoviaque/configuration,bugcy013/edx_infra,EDUlib/configuration,Livit/Livit.Learn.EdX.configuration,glengal/configuration,gsehub/configuration,gashac03/ubuntu,hastexo/edx-configuration,Carlos2005/configuration,pedrorib/istx,nikolas/configuration,Softmotions/configuration,Livit/Livit.Learn.EdX.configuration,arbrandes/edx-configuration,4eek/configuration,hastexo/edx-configuration-old,mitodl/configuration,openfun/configuration,knehez/configuration,EDUlib/configuration,gsehub/configuration,mitodl/configuration,louyihua/configuration,AlfiyaZi/configuration,IndonesiaX/configuration,zhengjunwei/configuration,AlfiyaZi/configuration,lgfa29/configuration,omarkhan/configuration,usernamenumber/configuration,arbrandes/edx-configuration,nikolas/configuration,Softmotions/configuration,vasyarv/configuration,usernamenumber/configuration,michaelsteiner19/open-edx-configuration,Livit/Livit.Learn.EdX.configuration,hks-epod/configuration,marcore/configuration,lgfa29/configuration,Carlos2005/configuration,rue89-tech/configuration,kencung/configuration,bugcy013/edx_infra,hastexo/edx-configuration-old,antshin72/configuration,kursitet/configuration,eduStack/configuration,zhengjunwei/configuration,pobrejuanito/configuration,hastexo/edx-configuration-old,nunpa/configuration,proversity-org/configuration,4eek/configuration,knehez/configuration,EDUlib/configuration,knehez/configuration,leansoft/configuration,xiangjf/configuration,proversity-org/configuration,nttks/configuration,rue89-tech/configuration,vasyarv/configuration,leansoft/configuration,Stanford-Online/configuration,hks-epod/configuration,stvstnfrd/configuration,hastexo/edx-configuration