Fail all up test if container build fails

Previously we did not fail the all up test if the container build
failed, this could result in some strange behavior where the test
progressed with an old container, giving inaccurate results.

tests/all-up-test.sh

@@ -1,10 +1,9 @@
 #!/bin/bash
+set -eux
 # the directory of this script, useful for allowing this script
 # to be run with any PWD
 DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
 
-result=$( docker images -q peggy-base )
-
 # builds the container containing various system deps
 # also builds Peggy once in order to cache Go deps, this container
 # must be rebuilt every time you run this test if you want a faster
@@ -17,7 +16,9 @@ docker rm -f peggy_all_up_test_instance
 set -e
 
 NODES=3
+set +u
 TEST_TYPE=$1
+set -u
 
 # Run new test container instance
 docker run --name peggy_all_up_test_instance --cap-add=NET_ADMIN -t peggy-base /bin/bash /peggy/tests/container-scripts/all-up-test-internal.sh $NODES $TEST_TYPE