Add fast, fast-manual sellingMethod for SSW
validation by api on tenderPeriod.endDate:
- "must be greater than or equal to 2022-04-06T07:14:19.374656+00:00"
- "must be less than or equal to 2022-04-06T10:18:33.137533+03:00"
- Change validation message of data/time to one format "+00:00" like others procedures have
- Add fast, fast-manual sellingMethod, because 1 min for rectificationPeriod is not enough for manual testing
https://procedure-dev.prozorro.sale/api/procedures/624d3d398d1401c001fae10d