PEL: Fill in getPELJSON function

This D-Bus method will return the PEL parsed into a JSON string by
calling /usr/bin/peltool and capturing the output.

Signed-off-by: Matt Spinler <spinler@us.ibm.com>
Change-Id: I47d2834a569c984a8bb71f06b73255ea5a9f5c7e
diff --git a/extensions/openpower-pels/manager.hpp b/extensions/openpower-pels/manager.hpp
index ae8670f..4432634 100644
--- a/extensions/openpower-pels/manager.hpp
+++ b/extensions/openpower-pels/manager.hpp
@@ -211,7 +211,7 @@
      *
      * @return std::string - The fully parsed PEL in JSON
      */
-    std::string getPELJSON(uint32_t obmcLogID);
+    std::string getPELJSON(uint32_t obmcLogID) override;
 
     /**
      * @brief Converts the ESEL field in an OpenBMC event log to a