Exit with error code

[rbioteau]

Currently, when a command fails, the program exit with a success status (0)

> java -jar code_sign_tool-1.3.0.jar get_credentials_ids -username=unknown -password=unknown
Error: The provided authorization grant is invalid...
> echo $?
0

Using an error code would prevent false positive build, when the script is integrated in a build pipeline.

In addition the provided CodeSignTool.sh script should have a proper shebang and fail on errors propely like below

#!/bin/bash
set -e

if [[ -z "${CODE_SIGN_TOOL_PATH}" ]]; then
  java -jar ./jar/code_sign_tool-1.3.0.jar $@
else
  java -jar ${CODE_SIGN_TOOL_PATH}/jar/code_sign_tool-1.3.0.jar $@
fi