Disable the npm propressbar in travis land

We don't actually have anyone looking at it, it's slow, and
all tests run this, wasting at least several seconds each time.

npm/npm#11283

tools/ci/before_script.sh

@@ -3,6 +3,7 @@ set -v
 if [[ -n "$TEST_SUITE" ]] ; then
   if [[ -n "$SPA_UI" ]] ; then
     pushd spa_ui/$SPA_UI
+      npm set progress=false
       npm install bower gulp -g
       npm install
       npm version