Implementing Upgrading VMs to Windows Update
New screen features:
-Create skeleton of the Upgrade VM dialog
-Implement a Go To Console link (just a link that opens a vm console)
-Implement logic to show the right status for a VM (includes rules to
get the states). Includes updating the dialog whenever the status changes.
-Add status texts to Messages, proper text on the UI
-Add stub methods to VM class in XenAPI-Extensions to r/w states from
Guest Agent
-UI: Implement rules what vms to display, checkbox rules, read only vms,
and when to enable the Upgrade button
-Implement Upgrade button (writes state for GA, mounts ISO) + maximum
parallel executions/actions
Signed-off-by: Gabor Apati-Nagy <gabor.apati-nagy@citrix.com>