dependencies of wip/ packages to robotpkg/ packages not handled
Since the migration of wip/ packages to a dedicated repository,
pkgrepo2deb is not able to properly add dependencies found in the main
robotpkg/ repository to the .deb package (which is thus lacking those).
This is because pkgrepo2deb computes expands dependencies with a
robotpkg_admin lsall in the wip/ repository, but this does not handle the
PKG_PATH to also look for them in the robotpkg/
Honour PKG_PATH when resolving robotpkg dependencies
The conversion from a robotpkg dependency to a debian dependency must list all
available robotpkg packages. This requires scanning PKG_PATH in addition to
$rpkgrepo, as not all dependencies might be in the same directory.
robotpkg_admin findbest is able to do this to find the best dependency, but
there is no robotpkg_admin findall that could do the same as robotpkg_admin
lsall. So one must manually iterate PKG_PATH entries with lsall and merge and
uniq the result.