install-chef-suse.sh: Update repos for SLES11-SP3 and Cloud 2.0

There are some checks that we have to disable for now as we don't have
all the final repos yet. This will need to be fixed at a later stage.
Merge pull request #1806 from vuntz/suse-sp3-cloud-2.0-repos

install-chef-suse.sh: Update repos for SLES11-SP3 and Cloud 2.0