clang-tidy: Enable performance-unnecessary-value-param check

This check flags value parameter declarations of expensive to copy
types that are copied for each invocation but it would suffice to
pass them by const reference.

Change-Id: I631deda63fcbb74362313c9596bf7e72933b0d0c
Signed-off-by: Pavithra Barithaya <pavithrabarithaya07@gmail.com>
diff --git a/image_manager.hpp b/image_manager.hpp
index ca4d676..21dd373 100644
--- a/image_manager.hpp
+++ b/image_manager.hpp
@@ -43,7 +43,7 @@
      *
      * @param[in] entryId - unique identifier of the entry
      */
-    void erase(std::string entryId);
+    void erase(const std::string& entryId);
 
   private:
     /** @brief Persistent map of Version dbus objects and their