Code review comment for lp:~psivaa/utah/upgrade-setup-jobs

Thanks for the comments, I've tried fixing the concerns in them. I have included to use explicit matrices for each type of upgrade jobs and that includes main and universe as well. Making the main and universe work still needs to be done in terms of creating the base install properly. That will be time consuming but that's on the list.

Note: I have not included a README, but that i'll do after doing some higher priority tasks.

Could you please look at the changes again. Thanks.