scenario for two PIs
updated scenarios
Merge branch 'development' of github.com:aheward/kuality-coeus into development

* 'development' of github.com:aheward/kuality-coeus:
  Removed a TODO because the method was created.
  DRYing up a step def.
corrected typos from key_personnel_validations.rb so units could be deleted from co-investigator