qa_crowbarsetup.sh: Don't try to start testvm after reboot on Cloud 5.x

The VMs are started meanwhile automatically on reboot, trying to start
them twice doesn't really make a lot of sense.
qa_crowbarsetup: add rsync_iso function

this wraps downloading an iso using a glob specifier
and unpacking its contents
qa_crowbarsetup: use current SLE12 iso
qa_crowbarsetup: make sure to not use the SLE12 iso
Wait for instance to be shut off after "nova stop"

We were rebooting the compute node too fast, and the instance was still
marked as ACTIVE, in the powering-off task state which was never
completed.
Revert "qa_crowbarsetup.sh: Don't try to start testvm after reboot on Cloud 5.x"

This reverts commit 53c4f34b0fc3150e9501498344413cfb12d1d4e2.
Merge pull request #158 from vuntz/fix-compute-reboot

Wait for instance to be shut off after "nova stop"
qa_crowbarsetup: reenable ha repos for cloud3+

Readd HA repositories when using Cloud3 or Cloud4. This was accidentally
remove in 2e35584049.
Merge pull request #159 from toabctl/readd-cloud3plus-ha

qa_crowbarsetup: reenable ha repos for cloud3+
qa_crowbarsetup.sh: Add support for SLE12 Compute media for susecloud/Mx
Merge pull request #160 from dirkmueller/master

qa_crowbarsetup.sh: Add support for SLE12 Compute media for susecloud/Mx
Adds SUSE cloud storage repositories to crowbar admin node