finish contrach closing order and fix rabbit some question

Helius

2020-06-01 4b844113469b203adc40f1e540de98612321f26e

 src/main/java/com/xcong/excoin/configurations/properties/SecurityProperties.java

@@ -14,4 +14,6 @@
public class SecurityProperties {

    private String privateKey;

    private String publicKey;
}