itest: limit asset list when finalizing mint batch

Addresses a similar problem as was observed and fixed in the previous
commit. In this case we were again listing all assets known about,
instead of only the unconfirmed ones we're actually interested in.

Author: jtobin

itest/utils.go

@@ -453,6 +453,9 @@ func FinalizeBatchUnconfirmed(t *testing.T, minerClient *rpcclient.Client,
 		ctxt, &taprpc.ListAssetRequest{
 			IncludeUnconfirmedMints: true,
 			ScriptKeyType:           allScriptKeysQuery,
+			AnchorOutpoint: &taprpc.OutPoint{
+				Txid: hashes[0][:],
+			},
 		},
 	)
 	require.NoError(t, err)