build: add set -e to various bash scripts that we want to error loudly (#718)

* build: add set -e to various bash scripts that we want to error loudly

* build: use sh and remove set -e for geth.sh

ops/scripts/batches.sh

 #!/bin/bash
+
+set -e
+
 RETRIES=${RETRIES:-40}
 
 if [[ ! -z "$URL" ]]; then

ops/scripts/dtl.sh

 #!/bin/bash
+
+set -e
+
 RETRIES=${RETRIES:-60}
 
 if [[ ! -z "$URL" ]]; then

ops/scripts/geth.sh

-#!/bin/bash
+#!/bin/sh
+
+# FIXME: Cannot use set -e since bash is not installed in Dockerfile
+# set -e
+
 RETRIES=${RETRIES:-40}
 VERBOSITY=${VERBOSITY:-6}
 

ops/scripts/relayer.sh

 #!/bin/bash
+
+set -e
+
 RETRIES=${RETRIES:-60}
 
 if [[ ! -z "$URL" ]]; then