PY-18538 Do not pass tox folder to test runners by default (user may pass custom folder)

Runner shall use current folder if no folder provided, or use one provided by user

python/testData/toxtest/toxDoubleRun/setup.py

@@ -0,0 +1,14 @@
+#!/usr/bin/python
+
+import os
+
+from setuptools import setup
+from setuptools import find_packages
+
+package = 'python_package_template'
+setup_dir = os.path.dirname(os.path.abspath(__file__))
+
+setup(name=package,
+      version="!",
+      include_package_data=True,
+      )

python/testData/toxtest/toxDoubleRun/test/unit/__init__.py

@@ -0,0 +1 @@
+__author__ = 'rpocase'

python/testData/toxtest/toxDoubleRun/test/unit/test_single_test.py

@@ -0,0 +1,5 @@
+from time import sleep
+
+
+def test_empty_class():
+    sleep(1)

python/testData/toxtest/toxDoubleRun/tox.ini

@@ -0,0 +1,10 @@
+[tox]
+envlist = py27
+
+
+[testenv]
+commands =py.test test/unit
+
+
+deps = pytest
+