message: refactor(core): deprecate hdPath in v2/wallets
  Since we don't know how `walletShare.keychain.path` is constructed we
  have to use `sanitizeLegacyPath()`.
  Issue:
diff: @@ -9,8 +9,8 @@ import { NodeCallback, RequestTracer as IRequestTracer } from './types';
  import { PaginationOptions, Wallet } from './wallet';
  import * as Bluebird from 'bluebird';
  import * as _ from 'lodash';
  -import { hdPath } from '../bitcoin';
  import { RequestTracer } from './internal/util';
  +import { sanitizeLegacyPath } from '../bip32path';
  const co = Bluebird.coroutine;
  @@ -617,7 +617,7 @@ export class Wallets {
  const rootExtKey = bitcoin.HDNode.fromBase58(sharingKeychain.prv);
  // Derive key by path (which is used between these 2 users only)
  - const privKey = hdPath(rootExtKey).deriveKey(walletShare.keychain.path);
  + const privKey = rootExtKey.derivePath(sanitizeLegacyPath(walletShare.keychain.path)).keyPair;
  const secret = self.bitgo.getECDHSecret({
  eckey: privKey,
  otherPubKeyHex: walletShare.keychain.fromPubKey,
  