entry: remove AdditionalData2

The 'AdditionalData2' property was a temporary addition to ease the
transition from an array to a dictionary for the additional data.
All users have been migrated to use the dictionary style and from the
'AdditionalData' property, so the '2' property can be removed.

Tested: Loaded an existing log database and observed dbus objects
are created successfully and with the 'AdditionalData2' field missing.
Created a new event with `log-create` CLI and observed new entry is
created successfully in dbus.

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: Ica3a9e5730eca8a7cf7755b769189347220e1639
diff --git a/log_manager.cpp b/log_manager.cpp
index 40c263c..bd902c3 100644
--- a/log_manager.cpp
+++ b/log_manager.cpp
@@ -454,7 +454,7 @@
         try
         {
             create(entry.message(), entry.id(), entry.timestamp(),
-                   entry.severity(), entry.additionalData2(), assocs, ffdc);
+                   entry.severity(), entry.additionalData(), assocs, ffdc);
         }
         catch (const std::exception& e)
         {