Use the same account address for managing testnet deployments?

[jcortejoso]

Is your feature request related to a problem? Please describe.

I noticed that current deployments use different accounts derived from the same mnemonic. For example:

Account [
  '0x73943d14131268F23b721E668911bCDDEcA9da62',
  '0x1ba74CaB4D011Fda10C26dc2bEDD810328a7fD72',
  '0x837b6AEd4d5fF4EDD356850EAdfE2a834b0e32C6',
  '0x0A0C7E21Efe52287E2f56cE4971c3cEbF5822aF3',
  '0x63D05A97C71f6EC29F2D062e83781806A5EaCe2C',
  '0x10f50eFd8F1Cae76e2f2F9f3A404E40667e7c4c6',
  '0x8AB347642bbE46BF59c185f18cd01F4D3626F54f',
  '0xA97D42F92993ceC67C96Cb944B9A19D99b1d75c0',
  '0xEbACD0f8972883C56b56316e67763196DF7fa9E4',
  '0xF2A177B1DF84D706ff1b5295404e133eEB4D67a7',
  '0x57a4a90E947Ee5524185Af448145FACb83a9CE7C',
  '0x75C2b399B2982bcc2245BADeCDE041197EEE85c6',
  '0x07826A4F5c21861822Ea4874374C81974C09fE98',
  '0xBaE71bcea4622Ee331b3bb36A86c2041832c3fE0',
  '0x1fA2f9996a4497DbD16cc0A4F013CB8546a2695E',
  '0xF79778Fd82c0030D2e8D6573Ed22046aC8136e82',
  '0x84D4bdEd3089a5f738aa13C76B0332036f1cf7FF',
  '0x41452D663dcfdD1612F11fDd10502218Fc237A75',
  '0x7BA51f978852CEF14A5553044A9Afd33a0f590eB',
  '0xc658191DB0b96C7c1d12aFA3440E9583801379ba'
]
Using default accounts
wallet {
  deployer: '0xEbACD0f8972883C56b56316e67763196DF7fa9E4',
  upgrader: '0xEbACD0f8972883C56b56316e67763196DF7fa9E4',
  governor: '0x57a4a90E947Ee5524185Af448145FACb83a9CE7C',
  ownerWallet: '0xEbACD0f8972883C56b56316e67763196DF7fa9E4',
  upgraderWallet: '0xEbACD0f8972883C56b56316e67763196DF7fa9E4',
  governorWallet: '0x57a4a90E947Ee5524185Af448145FACb83a9CE7C',
  contractNetworks: {}
}

The roles are configured in wallets.js as:

    let wallets = [
        { name: 'owner', account: accounts[8] },
        { name: 'upgrader', account: accounts[8] },
        { name: 'governor', account: accounts[10] }
    ]

Although having multiple roles with different addresses could be better for security/isolation purposes, it makes harder the balance management for testnets, particularly when the deployment process has to be automatized.

Describe the solution you'd like

It could be interesting being able to configure manually the key id for each role, or use [0] for testnets instead:

    let wallets = [
        { name: 'owner', account: accounts[0] },
        { name: 'upgrader', account: accounts[0] },
        { name: 'governor', account: accounts[0] }
    ]

Additional context

Add any other context or screenshots about the feature request here.