Log Message:
py-test-virtualenv: updated to 1.4.0

1.4.0:
* Fixing python 3 compatibility in Simple HTTP Server fixture
* Fixed broken tests in pytest-profiling
* Pinned pytest<4.0.0 until all deprecation warnings are fixed.
* pytest-webdriver: replaced deprecated phantomjs with headless Google Chrome.
* Add Vagrantfile to project to make test environment portable.
* Add .editorconfig file to project.
* pytest-server-fixtures: add TestServerV2 with Docker and Kubernetes support.
* pytest-server-fixtures: fix for an issue where MinioServer is not cleaned up \ 
after use.
* pytest-server-fixtures: fix deprecation warnings when calling pymongo.
* pytest-server-fixtures: close pymongo client on MongoTestServer teardown.
* pytest-server-fixtures: upgrade Mongo, Redis and RethinkDB to TestServerV2.
* coveralls: fix broken coveralls