MT#9177 Version of separate table per sync model.

Not sure that it will be really good model.
Just save before change to all models properties in one table.
MT#9177 Schema for provisioning with centralized table. Draft.
MT#9177 Fix comments for sync tables.
MT#9177 Clear off table from specific tables schema.
MT#9177 More generic sync_type and don't use vendor as sync_type marker.
MT#9177 Fix for the centralized parameters table
MT#9177 Fix incomplete commit with centralised parameter table
MT#9177 Rename sync_type to bootstrap_method
MT#9177 Add bootstrap_method into device.
MT#9177 Move vendor credentials to db
MT#9177 Fix vendors enum for contract credentials.