Update set_env.erb

[gberche-orange]

expected behavior

As a paas-templates operator

• in order to interactively execute helm commands
• I need an easy way to get the required environment set up in my current shell

observe behavior

source /var/vcap/jobs/action/bin/set_env brings the side effect of turning set -e flag in the current interactive shell, existing the shell on the first command with non-zero exit status

#restore the exit mode when this file is sourced within an interactive shell

[gberche-orange]

feedback received from @poblin-orange :

• care should be taken to restore the set -e for other scripts that might expect it
• consider alternative to automatically source the environment file in the bosh user

https://github.com/orange-cloudfoundry/k3s-boshrelease/blob/dbce4740e120ebf0fb1f8113c85ed22c2c0915d6/jobs/k3s-agent/templates/bin/setup-user-env.erb#L1-L15