message: [tests] fix - use rpc_timeout as rpc timeout
  Github-Pull:
  Rebased-From:
diff: @@ -78,7 +78,7 @@ class TestNode():
  for _ in range(poll_per_s * self.rpc_timeout):
  assert self.process.poll() is None, "bitcoind exited with status %i during initialization" % self.process.returncode
  try:
  - self.rpc = get_rpc_proxy(rpc_url(self.datadir, self.index, self.rpchost), self.index, coveragedir=self.coverage_dir)
  + self.rpc = get_rpc_proxy(rpc_url(self.datadir, self.index, self.rpchost), self.index, timeout=self.rpc_timeout, coveragedir=self.coverage_dir)
  self.rpc.getblockcount()
  # If the call to getblockcount() succeeds then the RPC connection is up
  self.rpc_connected = True
  