tests: close the mechanize browser after test
tests: close the mechanize browser after test

claudyus/LXC-Web-Panel,romses/LXC-Web-Panel,claudyus/LXC-Web-Panel,romses/LXC-Web-Panel,claudyus/LXC-Web-Panel,romses/LXC-Web-Panel,claudyus/LXC-Web-Panel,romses/LXC-Web-Panel