Puppeteer does need it's own chrome after all

The stable chrome travis provides is not supported.

.travis-test-riot.sh

@@ -31,7 +31,8 @@ popd
 git clone https://github.com/matrix-org/matrix-react-end-to-end-tests.git --branch bwindels/ci_script
 pushd matrix-react-end-to-end-tests
 ln -s $REACT_SDK_DIR/$RIOT_WEB_DIR riot/riot-web
-PUPPETEER_SKIP_CHROMIUM_DOWNLOAD=true ./install.sh
-
-CHROME_PATH=$(which google-chrome-stable) ./run.sh
+# PUPPETEER_SKIP_CHROMIUM_DOWNLOAD=true ./install.sh
+# CHROME_PATH=$(which google-chrome-stable) ./run.sh
+./install.sh
+./run.sh
 popd