This change fixes the ambiguity in the original class name, which
implied it was a btc wallet service, not a bsq and btc wallets service.

This commit includes the following changes:

 * New tests for methods `lockwallet`, `unlockwallet`,
   `removewalletpassword`, and `setwalletpassword`.

 * New `getbalance` method error handing tests to verify
   error message correctness when wallet is locked.

 * Update to `getversion` method test -- now expects `1.3.4`.

 * Check for new `[params]` column header in help text.

This addresses task #1 in issue bisq-network#4257.

This new gRPC WalletService method displays the BTC wallet's list of
receiving addresses.  The balance and number of confirmations
for the most recent transaction is displayed to the right of each
address.  Instead of returning a gRPC data structure to the client,
the service method returns a formatted String.

If the BTC wallet has no unused addresses, one will be created and
included in the returned list, and it can be used to fund the wallet.

The new method required injection of the BtcWalletService into CoreWalletsService,
and the usual boilerplate changes to grpc.proto, CliMain, and GrpcWalletService.

Some of the next PRs (for bisq-network#4257) will require some common functionality within
CoreWalletsService, so these additional changes were included:

  * a private, class level formatSatoshis function
  * a public getNumConfirmationsForMostRecentTransaction method
  * a public getAddressBalance method
  * a private getAddressEntry method

A unit test that verifies a successful return status was added to cli/test.sh.

Cleaned up the method body and improved the returned string's
formatting.  Also added a line for this method in the CLI help text.