Allow to resubmit pubkey to keep from CLI

[pdyraga]

Assume the following situation happens:

• Client generated keep public key successfully.
• Client submitted public key to the chain.
• Transaction was heavily underpriced and the client got restarted OR something else happened and the transaction did not make it to the chain (see #557).

Since key shares are stored on-disk, we could give the ability for the operator to resubmit the transaction from CLI passing the keep address.