Lisk-sdk: Snapshot creation fails in 1.0 with testnet data

[Nazgolze]

Expected behavior

A snapshot should be successfully created

Actual behavior

It fails. Here's the exact message:

[inf] 2018-06-11 17:10:10 | Rebuilding accounts states, current round: 49131, height: 4962131
[ERR] 2018-06-11 17:10:11 | Snapshot creation failed - Transaction type 7 is frozen

Steps to reproduce

1. Start Postgres, Checkout tag 0.9.16a, npm install, start lisk
2. Restore snapshot, sync up until current with testnet
3. Stop postgres
4. Checkout testnet-rc (for me, this was commit e7e476e8)
5. npm install
6. start lisk
7. start snapshotting
8. wait 26 hours

Which version(s) does this affect? (Environment, OS, etc...)

Tested in Ubuntu

[4miners]

Ofc it will fail because branch for testnet is not ready, it requires putting right height (last transaction type 7, or just height that we will migrate on) here: https://github.com/LiskHQ/lisk/blob/964830721e08324059801760b122707f94f27ebe/helpers/milestones.js#L27