extension: use map in create extension

Adjust the Create extension to use a map for metadata instead of
vector.

Tested: Unit tests updated and passing.

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I9bd62b8dcc8b18a61958ed64de98b52a48333637
diff --git a/log_manager.cpp b/log_manager.cpp
index fe89951..7d54e12 100644
--- a/log_manager.cpp
+++ b/log_manager.cpp
@@ -452,7 +452,7 @@
         try
         {
             create(entry.message(), entry.id(), entry.timestamp(),
-                   entry.severity(), entry.additionalData(), assocs, ffdc);
+                   entry.severity(), entry.additionalData2(), assocs, ffdc);
         }
         catch (const std::exception& e)
         {