Install data_files in the /etc directory.

def _create_data_files_directory(symlink=False):
        """Install data_files in the /etc directory."""
        current_directory = os.path.abspath(os.path.dirname(__file__))

        etc_kytos = os.path.join(BASE_ENV, ETC_KYTOS)

        if not os.path.exists(etc_kytos):
            os.makedirs(etc_kytos)

        src = os.path.join(current_directory, KYTOS_SKEL_PATH)
        dst = os.path.join(BASE_ENV, KYTOS_SKEL_PATH)

        if os.path.exists(dst):
            if not os.listdir(dst):
                # Path already exists but it's empty, so we'll populate it
                # We remove it first to avoid an exception from copytree
                os.rmdir(dst)
                shutil.copytree(src, dst)
        else:
            # It doesn't exist yet, so we should symlink or copy contents
            if symlink:
                os.symlink(src, dst)
            else:
                shutil.copytree(src, dst)