qa_crowbarsetup.sh: Make reboot_nodes more robust
qa_crowbarsetup.sh: Make reboot_nodes more robust

We need to wait for openstack services to be back online
before talking to them. This used to work before apparently
by accident because reboot is a lot slower with SLE11.

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