created validate api for call

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

@@ -0,0 +1,22 @@
+package net.gepafin.tendermanagement.enums;
+
+import com.fasterxml.jackson.annotation.JsonValue;
+
+public enum CallStatusEnum {
+
+        DRAFT("DRAFT"),
+        PUBLISH("PUBLISH"),
+        EXPIRE("EXPIRE"),
+        READY_TO_PUBLISH("READY_TO_PUBLISH");
+
+        private String value;
+
+      CallStatusEnum(String value) {
+            this.value = value;
+        }
+
+        @JsonValue
+        public String getValue() {
+            return value;
+        }
+}