Increase minimum vagrant version to 1.6.5
Increase minimum vagrant version to 1.6.5

The wiki page [here](https://github.com/edx/configuration/wiki/edX-Developer-Stack#installing-the-edx-developer-stack) says that the minimum Vagrant version is 1.6.5, not 1.5.3.
proversity-org/configuration,jorgeomarmh/configuration,michaelsteiner19/open-edx-configuration,appsembler/configuration,usernamenumber/configuration,hastexo/edx-configuration-old,Livit/Livit.Learn.EdX.configuration,marcore/configuration,usernamenumber/configuration,jorgeomarmh/configuration,edx/configuration,alu042/configuration,nunpa/configuration,stvstnfrd/configuration,omarkhan/configuration,appsembler/configuration,open-craft/configuration,Stanford-Online/configuration,stvstnfrd/configuration,kencung/configuration,open-craft/configuration,joshhu/configuration,IndonesiaX/configuration,antoviaque/configuration,arbrandes/edx-configuration,usernamenumber/configuration,eduStack/configuration,nunpa/configuration,mitodl/configuration,hastexo/edx-configuration-old,hastexo/edx-configuration,nunpa/configuration,arifsetiawan/configuration,Stanford-Online/configuration,armaan/edx-configuration,mitodl/configuration,hastexo/edx-configuration,Softmotions/configuration,hks-epod/configuration,lgfa29/configuration,CredoReference/configuration,edx/configuration,kursitet/configuration,proversity-org/configuration,openfun/configuration,rue89-tech/configuration,hastexo/edx-configuration,rue89-tech/configuration,antoviaque/configuration,pobrejuanito/configuration,4eek/configuration,kursitet/configuration,EDUlib/configuration,Stanford-Online/configuration,hks-epod/configuration,4eek/configuration,openfun/configuration,openfun/configuration,arbrandes/edx-configuration,joshhu/configuration,pobrejuanito/configuration,alu042/configuration,EDUlib/configuration,proversity-org/configuration,stvstnfrd/configuration,jorgeomarmh/configuration,lgfa29/configuration,proversity-org/configuration,nunpa/configuration,omarkhan/configuration,hks-epod/configuration,rue89-tech/configuration,rue89-tech/configuration,arbrandes/edx-configuration,kursitet/configuration,gsehub/configuration,hastexo/edx-configuration,Stanford-Online/configuration,4eek/configuration,arifsetiawan/configuration,fghaas/edx-configuration,gashac03/ubuntu,Softmotions/configuration,glengal/configuration,arbrandes/edx-configuration,fghaas/edx-configuration,michaelsteiner19/open-edx-configuration,CredoReference/configuration,Livit/Livit.Learn.EdX.configuration,open-craft/configuration,marcore/configuration,kursitet/configuration,gashac03/ubuntu,gashac03/ubuntu,Stanford-Online/configuration,mitodl/configuration,gsehub/configuration,Livit/Livit.Learn.EdX.configuration,edx/configuration,CredoReference/configuration,mitodl/configuration,stvstnfrd/configuration,fghaas/edx-configuration,glengal/configuration,gsehub/configuration,kencung/configuration,appsembler/configuration,armaan/edx-configuration,omarkhan/configuration,joshhu/configuration,hks-epod/configuration,alu042/configuration,hastexo/edx-configuration,antoviaque/configuration,kencung/configuration,michaelsteiner19/open-edx-configuration,4eek/configuration,pobrejuanito/configuration,appsembler/configuration,Livit/Livit.Learn.EdX.configuration,gashac03/ubuntu,EDUlib/configuration,gsehub/configuration,armaan/edx-configuration,edx/configuration,eduStack/configuration,IndonesiaX/configuration,arifsetiawan/configuration,michaelsteiner19/open-edx-configuration,usernamenumber/configuration,rue89-tech/configuration,Softmotions/configuration,hastexo/edx-configuration-old,hastexo/edx-configuration-old,stvstnfrd/configuration,arifsetiawan/configuration,EDUlib/configuration,armaan/edx-configuration,joshhu/configuration,eduStack/configuration,pobrejuanito/configuration,CredoReference/configuration,proversity-org/configuration,glengal/configuration,marcore/configuration,open-craft/configuration,arbrandes/edx-configuration,openfun/configuration,glengal/configuration,kencung/configuration,hks-epod/configuration,alu042/configuration,IndonesiaX/configuration,antoviaque/configuration,fghaas/edx-configuration,EDUlib/configuration,marcore/configuration,lgfa29/configuration,Softmotions/configuration,lgfa29/configuration,gsehub/configuration,jorgeomarmh/configuration,IndonesiaX/configuration,omarkhan/configuration