Fix to imports

Author: Haigutus

triplets/__init__.py

@@ -1,6 +1,6 @@
 from triplets import rdf_parser
 from triplets import cgmes_tools
-from triplets import rdfs_tools
+#from triplets import rdfs_tools
 from ._version import get_versions
 __version__ = get_versions()['version']
 del get_versions