implemented customerParam Api

src/main/java/com/billpaymentservice/bbps/dto/CustomParam.java

@@ -0,0 +1,23 @@
+package com.billpaymentservice.bbps.dto;
+
+import java.util.List;
+
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+
+@Getter
+@Setter
+@AllArgsConstructor
+@NoArgsConstructor
+public class CustomParam {
+	 private String customParamName;
+     private String dataType;
+     private boolean optional;
+     private int minLength;
+     private int maxLength;
+     private String regex;
+     private boolean visibility;
+     private List<String> values;
+}