Add new test for hmac_creation with latin-1 secret...* wqflask/tests/utility/test_hmac.py (test_hmac_creation_with_cookie):
New test. For this test, use a secret that behaves differently when
encoded to either utf-8 or latin-1.
Fix failing test...* wqflask/tests/base/test_trait.py: Add app_context to test class,
otherwise an error related to working outside the app_context is
generated. Adding the app_context is required when mocking "Flask.g".