* introduce a fix in the metrics tools introduced with 8821053ff8 in
order to deal with a struct that has fields that are not exported
(as is the case here)
* introduce a func in the toplevel metrics package that registers a
single metric, as that needs to be done explicitly for unexported
ones
* in the graph service, use RegisterAll and BuildInfo from the
toplevel metrics package, as introduced with 8821053ff8
Pascal Bleser
e4365320de