change RequestID to RequestId

Change-Id: Icb426614f391d2828c906155a0d37fd7da7c13f8
diff --git a/src/requester-state.hpp b/src/requester-state.hpp
index 3f6bba9..9ee0b53 100644
--- a/src/requester-state.hpp
+++ b/src/requester-state.hpp
@@ -56,7 +56,7 @@
   /**
    * @brief The CA-generated request ID for the request.
    */
-  RequestID m_requestId;
+  RequestId m_requestId;
   /**
    * @brief The current status of the request.
    */