InstanceIdDb: Move header from pldmd/ to common/

The header is used across all executables produced by the project, which
makes it "common".

Change-Id: I022b179fad1de8dba2ef39fd33bc240ec73a2d33
Signed-off-by: Andrew Jeffery <andrew@codeconstruct.com.au>
diff --git a/libpldmresponder/test/libpldmresponder_base_test.cpp b/libpldmresponder/test/libpldmresponder_base_test.cpp
index 8931f0c..f056ec8 100644
--- a/libpldmresponder/test/libpldmresponder_base_test.cpp
+++ b/libpldmresponder/test/libpldmresponder_base_test.cpp
@@ -1,6 +1,6 @@
+#include "common/instance_id.hpp"
 #include "common/utils.hpp"
 #include "libpldmresponder/base.hpp"
-#include "pldmd/instance_id.hpp"
 #include "test/test_instance_id.hpp"
 
 #include <libpldm/base.h>