Added Puppeteer tests

bigbluebutton-html5/.travis.yml

bigbluebutton-html5/Dockerfile.test

bigbluebutton-html5/mod/event_socket.conf.xml

bigbluebutton-html5/mod/external.xml

bigbluebutton-html5/mod/tomcat7

bigbluebutton-html5/restart.sh

bigbluebutton-html5/setup.sh

bigbluebutton-html5/supervisord.conf

bigbluebutton-html5/test-html5.sh

bigbluebutton-html5/tests/puppeteer/.env_template

bigbluebutton-html5/tests/puppeteer/.gitignore

bigbluebutton-html5/tests/puppeteer/README.md

bigbluebutton-html5/tests/puppeteer/elements.js

bigbluebutton-html5/tests/puppeteer/helper.js

bigbluebutton-html5/tests/puppeteer/package.json

bigbluebutton-html5/tests/puppeteer/page.js

bigbluebutton-html5/tests/puppeteer/params.js

...ebutton-html5/tests/puppeteer/screenshots/screenshots.txt

bigbluebutton-html5/tests/puppeteer/test-chat.js

bigbluebutton-html5/tests/puppeteer/test-draw.js