[qa] Increase wallet-dump RPC timeout

Increase wallet-dump RPC timeout from 30 seconds to 1 minute. This avoids a
timeout error that seemed to happen regularly (around 50% of builds) on a
particular jenkins server during the first getnewaddress RPC call made by the
test.

The failing stack trace looked like:

    Unexpected exception caught during testing: timeout('timed out',)

    File ".../bitcoin/qa/rpc-tests/test_framework/test_framework.py", line 146, in main
      self.run_test()
    File ".../bitcoin/qa/rpc-tests/wallet-dump.py", line 73, in run_test
      addr = self.nodes[0].getnewaddress()
    File ".../bitcoin/qa/rpc-tests/test_framework/coverage.py", line 49, in __call__
      return_val = self.auth_service_proxy_instance.__call__(*args, **kwargs)
    File ".../bitcoin/qa/rpc-tests/test_framework/authproxy.py", line 145, in __call__
      response = self._request('POST', self.__url.path, postdata.encode('utf-8'))
    File ".../bitcoin/qa/rpc-tests/test_framework/authproxy.py", line 121, in _request
      return self._get_response()
    File ".../bitcoin/qa/rpc-tests/test_framework/authproxy.py", line 160, in _get_response
      http_response = self.__conn.getresponse()
    File "/usr/lib/python3.4/http/client.py", line 1171, in getresponse
      response.begin()
    File "/usr/lib/python3.4/http/client.py", line 351, in begin
      version, status, reason = self._read_status()
    File "/usr/lib/python3.4/http/client.py", line 313, in _read_status
      line = str(self.fp.readline(_MAXLINE + 1), "iso-8859-1")
    File "/usr/lib/python3.4/socket.py", line 374, in readinto
      return self._sock.recv_into(b)

0 files changed, 0 insertions, 0 deletions