clean header file include

Change-Id: I5df52db13f964a92bba7cc8659ec6bcc222f5cbb
diff --git a/tools/ndncert-ca-status.cpp b/tools/ndncert-ca-status.cpp
index 8403173..db93c69 100644
--- a/tools/ndncert-ca-status.cpp
+++ b/tools/ndncert-ca-status.cpp
@@ -53,7 +53,7 @@
   }
 
   CaSqlite storage;
-  std::list<CertificateRequest> requestList;
+  std::list<RequestState> requestList;
   std::list<security::v2::Certificate> certList;
   if (caNameString != "") {
     requestList = storage.listAllRequests(Name(caNameString));