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 (using --inactive switch in lvcreate). This changeset
implements a workaround in SM so that the lvm patch can be
removed. Changed the logic to create a file with shorter name and
all other information is written inside the file.