generic group + wait instead of sleep

destributed-key-generation/src/test/java/Utils/BigIntegerByteEncoder.java

@@ -0,0 +1,28 @@
+package Utils;
+
+import java.math.BigInteger;
+
+/**
+ * Created by Tzlil on 4/7/2016.
+ */
+public class BigIntegerByteEncoder implements org.factcenter.qilin.util.ByteEncoder<BigInteger> {
+    @Override
+    public byte[] encode(BigInteger input) {
+        return input.toByteArray();
+    }
+
+    @Override
+    public BigInteger decode(byte[] input) {
+        return new BigInteger(1,input);
+    }
+
+    @Override
+    public int getMinLength() {
+        return 0;
+    }
+
+    @Override
+    public BigInteger denseDecode(byte[] input) {
+        return decode(input);
+    }
+}