Make sure we only update the machine config when we are locked.
While it doesn't make a functional differnce for cpu and memory it was a
problem for disk size. The disk size must be larger than the previous
one so we must have accurate data on the previous value.
Thus change the settings only while locked and refresh the config so we
have the current up to date values.
Signed-off-by: Paul Holzinger <pholzing@redhat.com>
3c9c5be7da