Add new test for hmac_creation with latin-1 secret
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.

genenetwork/genenetwork2,genenetwork/genenetwork2,zsloan/genenetwork2,zsloan/genenetwork2,pjotrp/genenetwork2,zsloan/genenetwork2,pjotrp/genenetwork2,pjotrp/genenetwork2,genenetwork/genenetwork2,zsloan/genenetwork2,genenetwork/genenetwork2,pjotrp/genenetwork2,pjotrp/genenetwork2