lease_dump_1.0.sh - deleted, now obsolete

src/bin/admin/scripts/pgsql/Makefile.am
    removed entries for lease_dump_1.0.sh

src/bin/admin/kea-admin.in
    get_dump_query() - modified SQL text returned for Postgres backend
    which calls stored functions to produce lease dumps  rather than
    SQL texti from lease_dump_<version>.sh

src/bin/admin/scripts/pgsql/dhcpdb_create.pgsql
    added statments to create lease dump functions:
        lease4DumpHeader
        lease4DumpData
        lease6DumpHeader
        lease6DumpData

src/bin/admin/tests/data/pgsql.lease6_dump_test.reference.csv
    Booleans were expected be 't' or 'f', changed to int 1 or 0