Handled rejected email rollback cases

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

@@ -6,7 +6,9 @@ public enum ApplicationAmendmentRequestEnum {
     AWAITING("AWAITING"),
     RESPONSE_RECEIVED("RESPONSE_RECEIVED"),
     CLOSE("CLOSE"),
-    EXPIRED("EXPIRED");
+    EXPIRED("EXPIRED"),
+    /** Amendment PEC email was rejected; only instructor can update until status is set back to AWAITING. */
+    DRAFT("DRAFT");
 
     private String value;