[16.0][17.0][18.0] stock_request: expected_date is ignored on create, and breaks duplicate

[matt454357]

Module

stock_request

Bug Description

1. When creating a new stock request, the Expected date is always today, ignoring the date entered by the user
2. When duplicating a stock request, the value of the expected_date field (which is required) is not passed to the create method, resulting in a validation error

To Reproduce

Affected versions: 16.0, 17.0, 18.0

Steps to reproduce the behavior of bug 1:

1. Click New
2. Specify an expected date other than today, and any other required fields
3. Save the new stock request

Steps to reproduce the behavior of bug 2:

1. Open an existing stock request
2. Click Action -> Duplicate

Expected behavior

1. New stock request should have the expected date as specified
2. Stock request should duplicate without validation error