Shell script error handling (#628)

* fn: fortify shell scripts with euo pipefail

go-fmt.sh

@@ -1,7 +1,6 @@
-#!/bin/sh
+#!/bin/bash
 # find and output all Go files that are not correctly formatted
-
-set -e
+set -euo pipefail
 
 # Find all .go files except those under vendor/ or .git, run gofmt -l on them
 OUT=$(find ! \( -path ./vendor -prune \) ! \( -path ./.git -prune \) -name '*.go' -exec gofmt -l {} +)

release.sh

@@ -1,5 +1,5 @@
 #!/bin/bash
-set -ex
+set -exuo pipefail
 
 user="fnproject"
 image="fnserver"

test.sh

@@ -1,7 +1,6 @@
 #!/bin/bash
 # Top level test script to start all other tests
-
-set -ex
+set -exuo pipefail
 
 function host {
     case ${DOCKER_LOCATION:-localhost} in