feat(btcreleaseclient): remove signatures from svp spend tx before searching

Author: apancorb

src/main/java/co/rsk/federate/btcreleaseclient/BtcReleaseClient.java

@@ -66,9 +66,6 @@
 import org.ethereum.core.Block;
 import org.ethereum.core.TransactionReceipt;
 import org.ethereum.crypto.ECKey;
-import org.ethereum.db.BlockStore;
-import org.ethereum.db.ReceiptStore;
-import org.ethereum.db.TransactionInfo;
 import org.ethereum.facade.Ethereum;
 import org.ethereum.listener.EthereumListenerAdapter;
 import org.ethereum.util.RLP;
@@ -295,9 +292,13 @@ public void onBlock(org.ethereum.core.Block block, List<TransactionReceipt> rece
          */
         private boolean isSVPSpendTxReadyToSign(long currentBlockNumber, Map.Entry<Keccak256, BtcTransaction> svpSpendTx) {
             try {
+                BtcTransaction btcTx = svpSpendTx.getValue();
+                Federation spendingFed = getSpendingFederation(btcTx);
+                removeSignaturesFromTransaction(btcTx, spendingFed);
+
                 int version = signer.getVersionForKeyId(BTC.getKeyId());
                 ReleaseCreationInformation releaseCreationInformation = releaseCreationInformationGetter.getTxInfoToSign(
-                    version, svpSpendTx.getKey(), svpSpendTx.getValue());
+                    version, svpSpendTx.getKey(), btcTx);
 
                 boolean isReadyToSign = Optional.ofNullable(releaseCreationInformation)
                     .map(ReleaseCreationInformation::getPegoutCreationBlock)