clang-tidy: enable clang-tidy

Enable the first check: readability-identifier-naming

Also fixed all check failures. The renaming is done by clang-tidy
automatically.

Tested:
1. compiles, no clang-tidy failures
2. tested on QEMU, Redfish is working correctly
3. tested on s7106, Redfish is working correctly; certificates can be
   retrieved.

Signed-off-by: Nan Zhou <nanzhoumails@gmail.com>
Change-Id: I3c5c9ca734146a94f4e0433ed8c1ae84173288c5
diff --git a/certs_manager.hpp b/certs_manager.hpp
index 02ea9bb..064d801 100644
--- a/certs_manager.hpp
+++ b/certs_manager.hpp
@@ -231,7 +231,7 @@
      *  @return     Pointer to EC private key
      */
     std::unique_ptr<EVP_PKEY, decltype(&::EVP_PKEY_free)>
-        generateECKeyPair(const std::string& p_KeyCurveId);
+        generateECKeyPair(const std::string& pKeyCurveId);
 
     /** @brief Write private key data to file
      *