qa_crowbarsetup.sh: Disable test update channel in the image
qa_crowbarsetup.sh: Don't disable ceilometer in mkcloud

We want to support ceilometer agents on SLE12 as well for
obvious reasons.
Refactors code for adding HA repos.
Merge pull request #156 from dirkmueller/master

reenable ceilometer
Merge pull request #157 from dguitarbite/ha_fix

Refactors code for adding HA repos.
Adds SUSE cloud storage repositories to crowbar admin node