message: refactor(utxo-lib): use createTransactionBuilderForNetwork in tests
  Issue:
diff: @@ -8,10 +8,10 @@ import networks = require('../../src/networks');
  import { createOutputScript2of3, ScriptType2Of3, scriptTypes2Of3 } from '../../src/bitgo/outputScripts';
  import { getNetworkList, getNetworkName, isBitcoin, isMainnet } from '../../src/coins';
  import { Network } from '../../src/networkTypes';
  -import { getDefaultSigHash, verifySignature } from '../../src/bitgo';
  +import { createTransactionBuilderForNetwork, getDefaultSigHash, verifySignature } from '../../src/bitgo';
  import { Transaction } from '../integration_local_rpc/generate/types';
  -import { createScriptPubKey, getTransactionBuilder } from '../integration_local_rpc/generate/outputScripts.util';
  +import { createScriptPubKey } from '../integration_local_rpc/generate/outputScripts.util';
  import { fixtureKeys } from '../integration_local_rpc/generate/fixtures';
  function runTest(network: Network, scriptType: ScriptType2Of3) {
  @@ -19,7 +19,7 @@ function runTest(network: Network, scriptType: ScriptType2Of3) {
  const prevOutputs = [[Buffer.alloc(32).fill(0xff).toString('hex'), 0, outputAmount]];
  function createSignedTransaction(keys: bip32.BIP32Interface[], signKeys: bip32.BIP32Interface[]) {
  - const txBuilder = getTransactionBuilder(network);
  + const txBuilder = createTransactionBuilderForNetwork(network);
  prevOutputs.forEach(([txid, vout]) => {
  txBuilder.addInput(txid, vout);
  