Code review comment for lp:~kim0/serverguide/serverguide-review-ch19

UEC as a product no longer exists, only the upstream eucalyptus project exists in universe. The docs were targeting UEC though. Note that the for eucalyptus users, lots of docs remain at https://help.ubuntu.com/community/UEC
I will be merging (in a few weeks) a chapter for serverguide targeting the new Ubuntu Cloud product that's based on OpenStack