Setup stake pool for TokenConfig

[abhayks1]

• This will deploy stake pool and update token config with stake pool address.

• While deploying stake pool for mosaic chain, --token-config argument is optional.

• Make sure validations are in place based on --token-config argument.

• Proposed command:

    ./mosaic setup-stake-pool <originChain> <originWeb3EndPoint> <deployer> <organizationOwner> <organizationAdmin> --token-config <tokenConfigPath>
  

• Update readme