Ticket(s): #191

Explanation of the solution

We stored axelar gateway and gasRecv contract addresses in:

• We stored the in the accounts config
• Registrar stored network config
• Router state (upon init)

We never used the accounts contract config storage versions so they've been easily removed.

The concept of Network was on the primary Registrar before but the Router is cross-chain. So for the Router to also use the Registrar as the source of truth, the storage and querying of networks needed to be moved down into the LocalRegistrar.

Instructions on making this work

• run yarn or yarn install to install npm dependencies
• run yarn test to verify all tests still pass