Fix SetVGName() to access object not dict
Fix SetVGName() to access object not dict

Reviewed-by: imsnah


bitemyapp/ganeti,ganeti-github-testing/ganeti-test-1,apyrgio/snf-ganeti,mbakke/ganeti,andir/ganeti,mbakke/ganeti,andir/ganeti,mbakke/ganeti,leshchevds/ganeti,apyrgio/ganeti,apyrgio/snf-ganeti,yiannist/ganeti,dimara/ganeti,dimara/ganeti,grnet/snf-ganeti,onponomarev/ganeti,ganeti/ganeti,leshchevds/ganeti,grnet/snf-ganeti,onponomarev/ganeti,leshchevds/ganeti,yiannist/ganeti,apyrgio/ganeti,ganeti-github-testing/ganeti-test-1,yiannist/ganeti,andir/ganeti,ganeti/ganeti,ganeti/ganeti,bitemyapp/ganeti