Prior to this commit, we "info" logged no meaningful information [1] about the
origin being loaded. With the following, we currently will have more context
about the status, type and origin being loaded.
This concerns the dvcs loaders for now (git, svn, mercurial)
Let's discuss to check if we want it and then i'll adapt the package loaders as well ;)
I may conflate logging statement and the result returned by the loader.
That returned status happens to be logged and i found this quite
convenient in the worker logs output though...
[1] The only information we have for now is what configuration file we loaded which
i don't find satisfying... D4011