Create/update inventory APIs returns 500 error if you pass value
greater than db.MAX_INT (2147483647) for total, reserved, min_unit,
max_unit, step_size int type parameters and db.SQL_SP_FLOAT_MAX
(3.40282e+38) for allocation_ratio.
Added maximum limit check in schema to ensure value is not greater than
maximum limit permitted by db for all mentioned parameters.
Closes-Bug: #1642484
Change-Id: I5b8c3c175ca617ae7bb82b81b0fe608ae1755b72