Added pytest dependency

requirements.yml

@@ -4,3 +4,4 @@ collections:
 pacman:
   - ansible
   - python-passlib
+  - python-pytest 

tests/unit/test_generate_vaulted_credentials.py

@@ -1,5 +1,3 @@
-# tests/unit/test_generate_vaulted_credentials.py
-
 import pytest
 import sys, os
 from pathlib import Path