Additional parameter to _deploy method

[roman-khimov]

Summary or problem description
Some contracts require initialization before their first real use and we have _deploy method now to run at deployment/update stage. But some contracts need to get an additional data for proper initialization (hashes of other contracts, addresses of admins, other data, https://github.com/nspcc-dev/neofs-contract/blob/c6fd4dc77c3aab3795057eb3fae2a7946285f3c5/alphabet/alphabet_contract.go#L59 for example) and we can't pass it at the moment to the _deploy thus an additional initialization transaction is still needed.

Do you have any solution you want to propose?
Add an additional StackItem data parameter to Deploy (and Update?) method of ManagementContract and pass it to _deploy callback.

Neo Version

• Neo 3

Where in the software does this update applies to?

• Other: ManagementContract