message: cmd/starcoin/cmd/starcoin: add multisig singatures file integration testing
  1. submit directly
  2. sign to file first, then submit
diff: @@ -59,6 +59,17 @@ Feature: cmd integration test
  Then cmd: "account generate-keypair -c 3"
  Then cmd: "account derive-address -t 2 -p @$[0].public_key@ -p @$[1].public_key@ -p @$[2].public_key@"
  Then cmd: "account transfer --blocking -r @$.receipt_identifier@ -t 0x1::STC::STC -v 10000000"
  + # account for testing only
  + Then cmd: "account import-multisig --pubkey 0x934e8a5a557229f90be7c95ec17fab84e64dcc3cf2dc934ff83ffc0915fad13e --pubkey 0x28358c05692e6758ba1398835525687c16d65abc9e1dc89023b46298ed2c575a --prikey 0x0c84a983ff0bfab39570c2ceed3e1c1feb645e84eccf9fd6baf4f49351a52329 --prikey 0x3695d6e08e3ad41962cba8c55ebb0552827807ae4cd6236d35195c769437272e -t 2"
  + Then cmd: "account unlock"
  + Then cmd: "account transfer --blocking -r 0x056d9bed868f8e8c74cf19109a2b375a -v 200000000"
  + Then cmd: "account unlock 0x056d9bed868f8e8c74cf19109a2b375a"
  + # enough signatures, submit directly
  + Then cmd: "account transfer -s 0x056d9bed868f8e8c74cf19109a2b375a -r 0x056d9bed868f8e8c74cf19109a2b375b -v 10000000 -b"
  + Then cmd: "account unlock 0x056d9bed868f8e8c74cf19109a2b375a"
  + # sign to file first
  + Then cmd: "account sign-multisig-txn -s 0x056d9bed868f8e8c74cf19109a2b375a --function 0x1::TransferScripts::peer_to_peer_v2 -t 0x1::STC::STC --arg 0x991c2f856a1e32985d9793b449c0f9d3 --arg 1000000u128 --output-dir /tmp"
  + Then cmd: "account submit-txn /tmp/417f79dd7e1be305a0db57ca731a2ed68ff06a5ca8567748c76f3793718fea63.multisig-txn -b"
  Then stop
  Examples:
  