[WAITING FOR SPEC UPDATE] Delete procedure.data signingPeriod, admissionPeriod fields

signingPeriod and admissionPeriod are related to award, and should not be present in procedure.data fields.

Spec: https://confluence-sale.prozorro.org/pages/viewpage.action?pageId=50365887, https://confluence-sale.prozorro.org/pages/viewpage.action?pageId=47448432

Consider changes in all types of renewables procedures.

All other periods should be added to spec (questionPeriod and waitingPeriod).