util: better handing of custom errors

This commit changes how we handle InvalidInput and System errors.
Instead of having formatting functions, the now just wrap a string and
should be created with fmt.Sprintf or similar. We also move all of the
error related code into a single place.

Finally, the utils package gets additional functionality with MinInt64
and GetUsername, and the UnderlyingError function gets better logging.

Note that this will break packages that depend on it. For instance,
metadata and crypto currently do not build. This is fixed in a later
commit.

Change-Id: I819e4d1970604456a5b4b6a7c86426f180a6d092

0 files changed, 0 insertions, 0 deletions