Also disable openvswitch-switch

This is to avoid strange GRE traffic flood happening on SDN VLAN.
fix post step error message
Merge pull request #16 from dirkmueller/master

Use local variables in functions (rebased)
Merge pull request #14 from SUSE-Cloud/fixovs

Also disable openvswitch-switch
Also deactivate trove and tempest

Other upgrade testing with mkcloud simply fails 100% of the
time for me.