Revert "vm: Pause vm in case volume allocation is greater than lv size"

This reverts commit ca1539b7c96bd1dacb1b583fcfe6cae3c2a514c3.
This patch has to be refactored.

Change-Id: I40b59d9dfefc37122a771a7dacf1a8e2ec7a18a0
Signed-off-by: Sergey Gotliv <sgotliv@redhat.com>
Reviewed-on: http://gerrit.ovirt.org/21014
Reviewed-by: Dan Kenigsberg <danken@redhat.com>