fixed https://github.com/allankp/pytest-testrail/issues/56 (#57)
fixed https://github.com/allankp/pytest-testrail/issues/56 (#57)

* Update plugin.py

fixed https://github.com/allankp/pytest-testrail/issues/56

* fixed list returning

dubner/pytest-testrail,allankilpatrick/pytest-testrail