qa_devstack: Add option to disable Tempest run

The script can be used to setup devstack in a VM for development as
well. In that case, a automatic Tempest run is not needed and can be
triggered manually.
Merge pull request #138 from toabctl/qa-devstack-disable-tempest

qa_devstack: Add option to disable Tempest run
qa_crowbarsetup.sh: Disable swift testing for SUSE Cloud 5
Merge pull request #139 from mjura/sles12-swift-tests

qa_crowbarsetup.sh: Disable swift testing for SUSE Cloud 5
qa_crowbarsetup.sh: Disable ceilometer tests for SLES12 compute nodes
Merge pull request #140 from mjura/sles12-ceilometer-tests

qa_crowbarsetup.sh: Disable ceilometer tests for SLES12 compute nodes
qa_crowbarsetup: use existing NFS mount for updates

euklid.nue is sometimes not reachable (due to broken 10.122 IP routing?)
qa_crowbarsetup: support physical QA clouds
Merge branch 'master' of github.com:SUSE-Cloud/automation into systemd-qemu2