cleanup: xen hypervisor
cleanup: xen hypervisor

Wrong indentation and uniformize one method signature.

Reviewed-by: amishchenko

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