tests: Add checking for #include "config.h" in test_code_style

This commit extents test_code_style with a check if all the sources
include config.h. File serialization_macros_generated.h had to be
re-generated using the latest version of the
serialization_macros_generate.sh script to pass this test.

Change-Id: I0bbe2b488794be989015aa6e832a68d0dba2595b