Break out Journal log into its own file

log_services.hpp probably shouldn't have been allowed to get as large
as it has.  This commit starts by breaking out functions from
log_services.hpp, and moves them to manager_logservices_journal.hpp.
Code is moved as-is with no functional changes.

Tested: Journal GET works as before.  Redfish service validator passes.

Change-Id: I93c372ae3e39967e1b0eaf0cf496f84ac4114b5c
Signed-off-by: Ed Tanous <ed@tanous.net>
diff --git a/redfish-core/src/redfish.cpp b/redfish-core/src/redfish.cpp
index 63d5b9d..303cca5 100644
--- a/redfish-core/src/redfish.cpp
+++ b/redfish-core/src/redfish.cpp
@@ -18,6 +18,7 @@
 #include "hypervisor_system.hpp"
 #include "log_services.hpp"
 #include "manager_diagnostic_data.hpp"
+#include "manager_logservices_journal.hpp"
 #include "managers.hpp"
 #include "memory.hpp"
 #include "message_registries.hpp"