fix(py27): uncaught exception in python 2

Author: oesteban

nipype/pipeline/engine/utils.py

@@ -255,8 +255,6 @@ def load_resultfile(results_file):
     """
     aggregate = True
     results_file = Path(results_file)
-    path = '%s' % results_file.parents
-
     result = None
     attribute_error = False
     if results_file.exists():

nipype/utils/filemanip.py

@@ -688,7 +688,7 @@ def loadpkl(infile, versioning=False):
         try:  # Look if pkl file contains version file
             pkl_metadata_line = pkl_file.readline()
             pkl_metadata = json.loads(pkl_metadata_line)
-        except UnicodeDecodeError:
+        except (UnicodeDecodeError, json.JSONDecodeError):
             pass
         finally:
             # Could not get version info