Update pytest configuration to include query_reformulator.py in coverage measurement

Author: kris-szlapa

packages/slackBotFunction/pytest.ini

@@ -2,4 +2,4 @@
 testpaths = tests
 python_files = test_*.py
 python_functions = test_*
-addopts = -v --tb=short --cov=app --cov-report=xml:coverage/coverage.xml --cov-report=term-missing
+addopts = -v --tb=short --cov=app --cov=query_reformulator --cov-report=xml:coverage/coverage.xml --cov-report=term-missing