core: Removed force select SPM command params storage pool id

Removed the storage pool id from the force select SPM command parameters
the storage pool id can be found easily since the host is a part of a single
pool anyway (or no pool at all) and we fetch the storage pool from the
database anyway so we can remove this overhead

Change-Id: I649d565b645664bf6b57227cc330494e2e158a8e
Signed-off-by: Tal Nisan <tnisan@redhat.com>
restapi: Support for force select SPM

Change-Id: Ida4a7abbcf0cbf3ae39c75c8431810fefb5c9404
Signed-off-by: Tal Nisan <tnisan@redhat.com>