Wizard config to openstack.yaml

 - removed wizard.json
 - all wizard config moved to base_release config
 - migration for 5.1 changed: already existing releases'
   "wizard_metadata" attribute is updated with
   proper data (i.e. without nsx info).

Change-Id: Ie6928b0e4b82882383fc74043a76f22400698b91
Closes-bug: 1348627
Merge "Wizard config to openstack.yaml"