message: test: Remove unused nVersion=1 in p2p tests
  After commit nVersion is no
  longer used in p2p logic when sending messages. Only when receiving
  messages, but in this test no messages are received.
diff: @@ -88,7 +88,6 @@ BOOST_AUTO_TEST_CASE(outbound_slow_chain_eviction)
  dummyNode1.SetCommonVersion(PROTOCOL_VERSION);
  peerLogic->InitializeNode(&dummyNode1);
  - dummyNode1.nVersion = 1;
  dummyNode1.fSuccessfullyConnected = true;
  // This test requires that we have a chain with non-zero work.
  @@ -141,7 +140,6 @@ static void AddRandomOutboundPeer(std::vector<CNode *> &vNodes, PeerManager &pee
  node.SetCommonVersion(PROTOCOL_VERSION);
  peerLogic.InitializeNode(&node);
  - node.nVersion = 1;
  node.fSuccessfullyConnected = true;
  connman->AddNode(node);
  @@ -231,7 +229,6 @@ BOOST_AUTO_TEST_CASE(peer_discouragement)
  CNode dummyNode1(id++, NODE_NETWORK, 0, INVALID_SOCKET, addr1, 0, 0, CAddress(), "", ConnectionType::INBOUND);
  dummyNode1.SetCommonVersion(PROTOCOL_VERSION);
  peerLogic->InitializeNode(&dummyNode1);
  - dummyNode1.nVersion = 1;
  dummyNode1.fSuccessfullyConnected = true;
  peerLogic->Misbehaving(dummyNode1.GetId(), DISCOURAGEMENT_THRESHOLD, /* message */ ""); // Should be discouraged
  {
  @@ -245,7 +242,6 @@ BOOST_AUTO_TEST_CASE(peer_discouragement)
  CNode dummyNode2(id++, NODE_NETWORK, 0, INVALID_SOCKET, addr2, 1, 1, CAddress(), "", ConnectionType::INBOUND);
  dummyNode2.SetCommonVersion(PROTOCOL_VERSION);
  peerLogic->InitializeNode(&dummyNode2);
  - dummyNode2.nVersion = 1;
  dummyNode2.fSuccessfullyConnected = true;
  peerLogic->Misbehaving(dummyNode2.GetId(), DISCOURAGEMENT_THRESHOLD - 1, /* message */ "");
  {
  @@ -282,7 +278,6 @@ BOOST_AUTO_TEST_CASE(DoS_bantime)
  CNode dummyNode(id++, NODE_NETWORK, 0, INVALID_SOCKET, addr, 4, 4, CAddress(), "", ConnectionType::INBOUND);
  dummyNode.SetCommonVersion(PROTOCOL_VERSION);
  peerLogic->InitializeNode(&dummyNode);
  - dummyNode.nVersion = 1;
  dummyNode.fSuccessfullyConnected = true;
  peerLogic->Misbehaving(dummyNode.GetId(), DISCOURAGEMENT_THRESHOLD, /* message */ "");
  