Checkin the assert.sh script, so we can expose test run time.

test/setup.sh

@@ -2,11 +2,6 @@
 
 set -e
 
-if ! [ -f "./assert.sh" ]; then
-    echo Fetching assert script
-    curl -sS https://raw.githubusercontent.com/lehmannro/assert.sh/master/assert.sh > ./assert.sh
-fi
-
 . ./config.sh
 
 echo Copying weave images and script to hosts