To make it work one has to create a symlink in 'dft/converters/plovasp' pointing to the built library 'atm.so'. Also, one has to use 'from <modulename> import <function>' inside the test itself to avoid problems with module name substitutions.
In version 1.4 all python applications moved from the root python library to `pytriqs/` subdirectory.
Wrapper description file 'atm_desc.py' is needed to generate a Python wrapper over the ATM library. Corresponding CMakeLists.txt has also been added.