Refactor NDG code

src/main/java/net/gepafin/tendermanagement/enums/NdgStatusEnum.java

@@ -0,0 +1,22 @@
+package net.gepafin.tendermanagement.enums;
+
+
+import com.fasterxml.jackson.annotation.JsonValue;
+
+public enum NdgStatusEnum {
+
+    NDG_INITITATED("NDG_INITITATED"),
+    NDG_GENERATED("NDG_GENERATED"),
+    NDG_IN_PROGRESS("NDG_IN_PROGRESS");
+
+    private String value;
+
+    NdgStatusEnum(String value) {
+        this.value = value;
+    }
+
+    @JsonValue
+    public String getValue() {
+        return value;
+    }
+}