Break elog yaml files into two pieces

This is the final piece to supporting the phosphor-dbus-interfaces
design where the errors are defined in one yaml file and
their corresponding meta data is defined within another file.

Change-Id: Idd2e18c1fd82fccb1298a2570a484deb382954f8
Signed-off-by: Andrew Geissler <andrewg@us.ibm.com>
3 files changed