rellib macro says library is successfully (re)loaded for non existing libraries

[gjover]

Even if the library does not exists, the macro returns the same message

Door_BL09 [10]: rellib adsfg
adsfg successfully (re)loaded

In the log one can see the error

Invalid module adsfg
raceback (most recent call last):
  File "/usr/lib/python3/dist-packages/sardana/sardanamodulemanager.py", line 192, in isValidModule
    mfile, pathname, desc = imp.find_module(module_name, path)
  File "/usr/lib/python3.5/imp.py", line 296, in find_module
    raise ImportError(_ERR_MSG.format(name), name=name)
ImportError: No module named 'adsfg'