message: test: verify bitcoin-cli -version with node stopped
  in interface_bitcoin_cli.py and improve/harmonize the test logging.
diff: @@ -25,11 +25,8 @@ class TestBitcoinCli(BitcoinTestFramework):
  """Main test logic"""
  self.nodes[0].generate(BLOCKS)
  - cli_response = self.nodes[0].cli("-version").send_cli()
  - assert "{} RPC client version".format(self.config['environment']['PACKAGE_NAME']) in cli_response
  -
  - self.log.info("Compare responses from getwalletinfo RPC and `bitcoin-cli getwalletinfo`")
  if self.is_wallet_compiled():
  + self.log.info("Compare responses from getwalletinfo RPC and `bitcoin-cli getwalletinfo`")
  cli_response = self.nodes[0].cli.getwalletinfo()
  rpc_response = self.nodes[0].getwalletinfo()
  assert_equal(cli_response, rpc_response)
  @@ -55,10 +52,10 @@ class TestBitcoinCli(BitcoinTestFramework):
  self.log.info("Test connecting with non-existing RPC cookie file")
  assert_raises_process_error(1, "Could not locate RPC credentials", self.nodes[0].cli('-rpccookiefile=does-not-exist', '-rpcpassword=').echo)
  - self.log.info("Make sure that -getinfo with arguments fails")
  + self.log.info("Test -getinfo with arguments fails")
  assert_raises_process_error(1, "-getinfo takes no arguments", self.nodes[0].cli('-getinfo').help)
  - self.log.info("Test that -getinfo returns the expected network and blockchain info")
  + self.log.info("Test -getinfo returns expected network and blockchain info")
  cli_get_info = self.nodes[0].cli('-getinfo').send_cli()
  network_info = self.nodes[0].getnetworkinfo()
  blockchain_info = self.nodes[0].getblockchaininfo()
  @@ -72,7 +69,7 @@ class TestBitcoinCli(BitcoinTestFramework):
  assert_equal(cli_get_info['chain'], blockchain_info['chain'])
  if self.is_wallet_compiled():
  - self.log.info("Test that -getinfo returns the expected wallet info")
  + self.log.info("Test -getinfo returns expected wallet info")
  assert_equal(cli_get_info['balance'], BALANCE)
  wallet_info = self.nodes[0].getwalletinfo()
  assert_equal(cli_get_info['keypoolsize'], wallet_info['keypoolsize'])
  @@ -84,6 +81,10 @@ class TestBitcoinCli(BitcoinTestFramework):
  self.stop_node(0)
  + self.log.info("Test -version with node stopped")
  + cli_response = self.nodes[0].cli("-version").send_cli()
  + assert "{} RPC client version".format(self.config['environment']['PACKAGE_NAME']) in cli_response
  +
  self.log.info("Test -rpcwait option waits for RPC connection instead of failing")
  # Start node without RPC connection.
  self.nodes[0].start()
  