mkcloud-common: move common variables to the bottom
mkcloud-common: move common variables to the bottom

The common variables will soon require functions that
are currently listed below them. In order to make
these accessible the common variables and computation
of defaults needs to move to the bottom.

aspiers/automation,vmoravec/automation,gosipyan/automation,SUSE-Cloud/automation,SUSE-Cloud/automation,SUSE-Cloud/automation,aspiers/automation,vmoravec/automation,gosipyan/automation,vmoravec/automation,gosipyan/automation,gosipyan/automation,vmoravec/automation,SUSE-Cloud/automation,aspiers/automation,aspiers/automation