[ACS41] Ubuntu upgrade process from 4.0.X to 4.1

[Wido den Hollander]

Hi,

I've started a Wiki[0] to describe the upgrade process going from 4.0 to 
4.1 with Ubuntu packages.

Since the packages got renamed from cloud-* to cloudstack-* a lot has 
changed and some manual intervention is required.

The Wiki is work-in-progress while I'm upgrading one of my 4.0 clusters 
to 4.1 and see how it all works out.

Feel free to change the Wiki if you find something that needs to be 
adressed!

Wido

[0]: 
https://cwiki.apache.org/confluence/display/CLOUDSTACK/Ubuntu+upgrade+process