Add tests and some modification in fabfile

Add pkill -9 before restart cozy-controller to kill process duplicated in case where cozy-controller was started twice.

Install brunch before install home. 

Add file to test install script : 
Problem to solve : 
  * Grub isn't automatic
  * Sometimes home doesn't work first time.

When cozy-monitor install app would be ok, uncomment test_install_app().