security: Integrate fetching certificates using Certificate Bundle

Change-Id: Iebac12a5cb9d1f4aa12aad09e8ef27f5b90a5d90
Refs: #3891
diff --git a/src/security/v2/certificate-fetcher.hpp b/src/security/v2/certificate-fetcher.hpp
index 7abc5f5..cbf221b 100644
--- a/src/security/v2/certificate-fetcher.hpp
+++ b/src/security/v2/certificate-fetcher.hpp
@@ -51,7 +51,7 @@
    * @brief Assign certificate storage to check known certificate and to cache unverified ones
    * @note The supplied @p certStorage should be valid for the lifetime of CertificateFetcher
    */
-  void
+  virtual void
   setCertificateStorage(CertificateStorage& certStorage);
 
   /**