CP-5818: Productise removal of lvm2-lvcreate-inactive-flag.patch

Snapshot creation process uses a temp file with all snapshot
information in the name of the file. Since this name is too long
and not liked my devmapper, the file is created in an inactive
mode. Changed the logic to create a file with shorter name and
all informaton inside the file. Inactive flag for lvcreate is
no longer required.

Signed-off-by: Chandrika Srinivasan <chandrika.srinivasan@citrix.com>
Reviewed-by: Thanos Makatos <thanos.makatos@citrix.com>