Updated tox.ini

- More verbose output from py.test
- Passing all the environment variables into tox,
  no need to specify explicitly each needed variable

Author: freskoulix

tox.ini

@@ -2,8 +2,8 @@
 envlist = py27
 
 [testenv]
-install_command = pip install -U {opts} {packages} --no-cache
+install_command = pip install -U {opts} {packages}
 deps = -r{toxinidir}/requirements.txt
-commands = py.test {posargs} # Pass all command line args from tox to py.test.
+commands = py.test -s {posargs} # Pass all command line args from tox to py.test.
                              # e.g., `tox <foo>` will invoke `py.test <foo>`.
-passenv = CODEBENDER_SELENIUM_HUB_URL
+passenv = *