Vagrant - sendfile python3.5 debian-stretch (#12454)

* vagrant dev - force hass-AIOHTTP to not use sendfile
Ref: https://www.virtualbox.org/ticket/9069
strongly needed for `home-assistant-polymer`

* vagrant dev - python 3.4 to 3.5 by upgrade to debian-stretch

virtualization/vagrant/Vagrantfile

@@ -2,7 +2,7 @@
 # vi: set ft=ruby :
 
 Vagrant.configure(2) do |config|
-  config.vm.box = "debian/contrib-jessie64"
+  config.vm.box = "debian/contrib-stretch64"
   config.vm.synced_folder "../../", "/home-assistant"
   config.vm.synced_folder "./config", "/root/.homeassistant"
   config.vm.network "forwarded_port", guest: 8123, host: 8123

virtualization/vagrant/home-assistant@.service

@@ -16,5 +16,8 @@ ExecStart=/usr/bin/hass --runner
 SendSIGKILL=no
 RestartForceExitStatus=100
 
+# on vagrant (vboxfs), disable sendfile https://www.virtualbox.org/ticket/9069
+Environment=AIOHTTP_NOSENDFILE=1
+
 [Install]
 WantedBy=multi-user.target

virtualization/vagrant/provision.sh

@@ -105,7 +105,7 @@ main() {
                     vagrant up --provision; exit ;;
     esac
     # ...otherwise we assume it's the Vagrant provisioner
-    if [ $(hostname) != "contrib-jessie" ]; then usage; exit; fi
+    if [ $(hostname) != "contrib-jessie" ] && [ $(hostname) != "contrib-stretch" ]; then usage; exit; fi
     if ! [ -f $SETUP_DONE ]; then setup; fi
     if [ -f $RESTART ]; then restart; fi
     if [ -f $RUN_TESTS ]; then run_tests; fi