Introduce new VM size

[JaimieWi]

What is being addressed

New VM size added to list of options for all users. The Standard_NV6ads_A10_v5 will now be available for Windows and Linux.

File_mode=0777 also added to the vm-shared-storage so that users can save files directly to the file share.

Measures put in place to prevent screen locking, but not at a solution yet.

How is this addressed

• add file_mode=0777
• Add to porter bundle template
• Below added

echo "init_vm.sh: Disabling lock screen"

# Remove xfce4-screensaver (to disable screen saver)
sudo apt-get remove xfce4-screensaver -y

# Disable lock screen using gsettings
gsettings set org.gnome.desktop.screensaver lock-enabled false
gsettings set org.gnome.desktop.screensaver idle-activation-enabled false

# Disable lock screen via XFCE Power Manager settings
xfconf-query -c xfce4-power-manager -p /general/lockscreen-suspend-hibernate -s false
xfconf-query -c xfce4-power-manager -p /general/lockscreen -s false

[GamblingFool]

Following merge of jcw/new-vm-size PR success