Fix logic when intializing an Evaluation

[samlamont]

• Defaults:
  • create_dir=False
  • check_evaluation_dir=True
• Check if dir_path exists
  • If not, and create_dir=True, create it
  • If not and create_dir=False, raise error
• Then if create_dir=False, check evaluation version

[samlamont]

Addressed in #537