add NDNCERT_prefix and small fixes

Change-Id: I7ad5e3258599e62cce437555e64a3b461b08f8e6
diff --git a/src/identity-challenge/challenge-credential.hpp b/src/identity-challenge/challenge-credential.hpp
index 0a80a17..38a7e1a 100644
--- a/src/identity-challenge/challenge-credential.hpp
+++ b/src/identity-challenge/challenge-credential.hpp
@@ -71,11 +71,11 @@
   static const std::string PARAMETER_KEY_CREDENTIAL_CERT;
   static const std::string PARAMETER_KEY_PROOF_OF_PRIVATE_KEY;
 
-PUBLIC_WITH_TESTS_ELSE_PRIVATE:
+NDNCERT_PUBLIC_WITH_TESTS_ELSE_PRIVATE:
   void
   parseConfigFile();
 
-PUBLIC_WITH_TESTS_ELSE_PRIVATE:
+NDNCERT_PUBLIC_WITH_TESTS_ELSE_PRIVATE:
   std::list<security::Certificate> m_trustAnchors;
   std::string m_configFile;
 };