Update Journal Variable Names

Journal entry variable names should be uppercase.
https://www.freedesktop.org/software/systemd/man/sd_journal_print.html

Change-Id: I1e7f6872d6f4be24f92458d6c1c4bab3b7dbcda0
Signed-off-by: Gunnar Mills <gmills@us.ibm.com>
diff --git a/item_updater.cpp b/item_updater.cpp
index 625147e..502a8e0 100644
--- a/item_updater.cpp
+++ b/item_updater.cpp
@@ -164,8 +164,8 @@
             auto pnorTOC = iter.path() / PNOR_TOC_FILE;
             if (!fs::is_regular_file(pnorTOC))
             {
-                log<level::ERR>("Failed to read pnorTOC.\n",
-                                entry("FileName=%s", pnorTOC.string()));
+                log<level::ERR>("Failed to read pnorTOC.",
+                                entry("FILENAME=%s", pnorTOC.string()));
                 ItemUpdater::erase(id);
                 continue;
             }
@@ -408,7 +408,7 @@
     if (response.is_method_error())
     {
         log<level::ERR>("Error in fetching current Chassis State",
-                        entry("MapperResponse=%s",
+                        entry("MAPPERRESPONSE=%s",
                               (mapperResponse.begin()->first).c_str()));
         elog<InternalFailure>();
     }