fix: clear asset genesis to prevent accounts referencing undefined assets

[mchristou]

closes #480

When customizing parachain chain-specs, runtime presets may include
asset account balances for assets that are not defined in the genesis.
This causes pallet_assets genesis build to panic with "assertion failed:
result.is_ok()" when increase_balance() is called for non-existent assets.

Clear assets genesis data in clear_authorities()
to ensure accounts aren't assigned balances for undefined assets.

[pepoviola]

Thanks @mchristou, I just commented here since I think we (zombienet) should only modify/remove keys needed to spawn the network. Here we can take the opposite approach and ensure that the account in assets is present since is a better dx for end users.

Thx!

[mchristou]

Thanks @mchristou, I just commented here since I think we (zombienet) should only modify/remove keys needed to spawn the network. Here we can take the opposite approach and ensure that the account in assets is present since is a better dx for end users.

Thx!

Hi @pepoviola, yes that make sense.
If there's no corresponding entry in assets for each account should we remove it or add a default one?

[mchristou]

closing in favor of #482