Use a patched pytest-order

pytest-order contains a fix for parameterized tests in 1.0, but
that version dropped support for Python 3.5. This patched version
runs on Python 3.5 and has all the other updates in pytest-order 1.0.

requirements-test.txt

@@ -1,7 +1,8 @@
 -r requirements.txt
 pytest
 pytest-cov
-pytest-order<1.0
+# We need a patched version of pytest-cov to run on 3.5 and handle parameterized tests
+git+https://github.com/SecurityInnovation/pytest-order.git@07ceb36233fb083275f34d5c8abbd3e35cd00158#egg=pytest-order
 flake8
 pep8-naming
 # NOTE: gpg is not here on purpose currently

tox.ini

@@ -23,7 +23,8 @@ deps =
     six>=1.9.0
     pytest
     pytest-cov
-    pytest-order<1.0
+    # We need a patched version of pytest-cov to run on 3.5 and handle parameterized tests
+    git+https://github.com/SecurityInnovation/pytest-order.git@07ceb36233fb083275f34d5c8abbd3e35cd00158#egg=pytest-order
 
 install_command = pip install {opts} --no-cache-dir {packages}
 commands =