feature fee address

[sampocs]

Context

There's been some discussion on the best way to create the fee module account.

How we got here

• The code on main was working on dockernet, but threw an error when initializing the chain for the testnet
• It's not clear why it didn't work on both, but it appears that the genesis validation was being run independent from InitGenesis
• When testing the .GetModuleAccount approach from informal - we were forgetting to register the module with maccPerms, which is why it was failing

Conclusion

• The .GetModuleAccount approach does work if we add it to maccPerms
• There's really no need to store this on the host zone if it's a normal module account - we can query it through the auth store
• There's also no need to validate the address in genesis since it's a module account

Brief Changelog

• Removed fee address from host zone
• Added module account using .GetModuleAccount approach
• Added module name to maccPerms
• Updated LS and distribute logic to use new account
• Fixed unit tests
• Fixed dockernet scripts

Testing

• Covered by unit test
• Tested distribution to STRD stakers in dockernet

[asalzmann]

lgtm, this seems cleaner!