rpctest: Update for removal of wire.BlockVersion

This adds constant for the block version to the rpctest package since it
is no longer available via the wire package due to the new BIP0009 code.

rpctest/rpc_harness.go

@@ -30,6 +30,10 @@ const (
 	maxPeerPort = 35000
 	minRPCPort  = maxPeerPort
 	maxRPCPort  = 60000
+
+	// BlockVersion is the default block version used when generating
+	// blocks.
+	BlockVersion = 4
 )
 
 var (
@@ -377,7 +381,7 @@ func (h *Harness) GenerateAndSubmitBlock(txns []*btcutil.Tx, blockVersion int32,
 	defer h.Unlock()
 
 	if blockVersion == -1 {
-		blockVersion = wire.BlockVersion
+		blockVersion = BlockVersion
 	}
 
 	prevBlockHash, prevBlockHeight, err := h.Node.GetBestBlock()

rpctest/rpc_harness_test.go

@@ -363,9 +363,9 @@ func testGenerateAndSubmitBlock(r *Harness, t *testing.T) {
 			"expected %v, got %v", numTxns+1, numBlocksTxns)
 	}
 	blockVersion := block.MsgBlock().Header.Version
-	if blockVersion != wire.BlockVersion {
+	if blockVersion != BlockVersion {
 		t.Fatalf("block version is not default: expected %v, got %v",
-			wire.BlockVersion, blockVersion)
+			BlockVersion, blockVersion)
 	}
 
 	// Next generate a block with a "non-standard" block version along with