lazy-pages: summary: allow different total and copied pages

With address space manipulations, amount of pages that the lazy-pages
daemon will copy might differ from amount of pages we had in the dumps.
Disable the warning and error retval for now; we can restore the accounting
once uffd event handling stabilizes a bit.

travis-ci: success for lazy-pages: add non-#PF events handling (rev2)
Signed-off-by: Mike Rapoport <rppt@linux.vnet.ibm.com>
Signed-off-by: Pavel Emelyanov <xemul@virtuozzo.com>