Update apt-get before installing dependencies (as recommended by travis: https://docs.travis-ci.com/user/installing-dependencies/#Installing-Ubuntu-packages)
Update apt-get before installing dependencies (as recommended by travis: https://docs.travis-ci.com/user/installing-dependencies/#Installing-Ubuntu-packages)

arbrandes/edx-configuration,edx/configuration,alu042/configuration,open-craft/configuration,nunpa/configuration,pobrejuanito/configuration,kursitet/configuration,proversity-org/configuration,mitodl/configuration,gsehub/configuration,hks-epod/configuration,gsehub/configuration,proversity-org/configuration,eduStack/configuration,lgfa29/configuration,openfun/configuration,Stanford-Online/configuration,michaelsteiner19/open-edx-configuration,alu042/configuration,pobrejuanito/configuration,CredoReference/configuration,proversity-org/configuration,gsehub/configuration,hastexo/edx-configuration,mitodl/configuration,fghaas/edx-configuration,rue89-tech/configuration,fghaas/edx-configuration,alu042/configuration,CredoReference/configuration,lgfa29/configuration,arbrandes/edx-configuration,hastexo/edx-configuration,Stanford-Online/configuration,armaan/edx-configuration,hastexo/edx-configuration,armaan/edx-configuration,pobrejuanito/configuration,EDUlib/configuration,EDUlib/configuration,rue89-tech/configuration,antoviaque/configuration,armaan/edx-configuration,nunpa/configuration,Stanford-Online/configuration,open-craft/configuration,antoviaque/configuration,proversity-org/configuration,Stanford-Online/configuration,arbrandes/edx-configuration,arbrandes/edx-configuration,EDUlib/configuration,nunpa/configuration,edx/configuration,Livit/Livit.Learn.EdX.configuration,fghaas/edx-configuration,usernamenumber/configuration,hastexo/edx-configuration,antoviaque/configuration,usernamenumber/configuration,kursitet/configuration,CredoReference/configuration,Livit/Livit.Learn.EdX.configuration,stvstnfrd/configuration,mitodl/configuration,gsehub/configuration,stvstnfrd/configuration,eduStack/configuration,marcore/configuration,marcore/configuration,antoviaque/configuration,rue89-tech/configuration,jorgeomarmh/configuration,hks-epod/configuration,jorgeomarmh/configuration,michaelsteiner19/open-edx-configuration,kursitet/configuration,hks-epod/configuration,armaan/edx-configuration,jorgeomarmh/configuration,lgfa29/configuration,jorgeomarmh/configuration,usernamenumber/configuration,fghaas/edx-configuration,michaelsteiner19/open-edx-configuration,EDUlib/configuration,open-craft/configuration,lgfa29/configuration,gsehub/configuration,hastexo/edx-configuration,Livit/Livit.Learn.EdX.configuration,Stanford-Online/configuration,hks-epod/configuration,pobrejuanito/configuration,marcore/configuration,rue89-tech/configuration,Livit/Livit.Learn.EdX.configuration,appsembler/configuration,edx/configuration,mitodl/configuration,arbrandes/edx-configuration,michaelsteiner19/open-edx-configuration,stvstnfrd/configuration,rue89-tech/configuration,appsembler/configuration,kursitet/configuration,openfun/configuration,stvstnfrd/configuration,appsembler/configuration,stvstnfrd/configuration,openfun/configuration,edx/configuration,open-craft/configuration,proversity-org/configuration,eduStack/configuration,CredoReference/configuration,EDUlib/configuration,openfun/configuration,appsembler/configuration,nunpa/configuration,marcore/configuration,usernamenumber/configuration,alu042/configuration,hks-epod/configuration