Previously, the pkg_object has been found by iterating over pkg_sets
for each package. This was quite slow given the number of RPMs in the
compose.
In this commit, the temporary dict is created which stores mapping
between path and pkg_obj and is used instead.
In this commit, the get_package_path is called just once instead of
twice in the loop which might also save some time.
Signed-off-by: Jan Kaluza <jkaluza@redhat.com>
4562fba459