Make pytest in tox quite

[awarecan]

Description:

Current pytest output a beautiful progress bar, it is cool watching it in term. However it is meaningless in CI environment.

Add following options to pytest to quite the output as much as possible.

option
-qq	quite and quiter
-o console_output_style=count	change default percent progress to count
-p no:sugar	disable beautiful pytest-sugar plugin

It will reduce some scrolling time I spent on finding the actual pytest error message on travis.

Reduced to 668 lines from 1200 lines of log

Related issue (if applicable): fixes #

Pull request in home-assistant.io with documentation (if applicable): home-assistant/home-assistant.io#<home-assistant.io PR number goes here>

Example entry for configuration.yaml (if applicable):

Checklist:

• The code change is tested and works locally.
• Local tests pass with tox. Your PR cannot be merged unless tests pass
• There is no commented out code in this PR.