In nova, the [compute]allow_resize_to_same_host parameter is only used
by nova-api process, thus the parameter should be set at the node
where nova-api is running.
Because we alreday have the nova::api::allow_resize_to_same_host
parameter to set that parameter for nova-api, we can deprecate
the allow_resize_to_same_host parameter in nova::compute, which is
almost useless now.
Change-Id: Id58b4dad29a6ea0f2998d8e41aa09ba0037ea94c