Fix typo in sed command + Add shell options to scripts

[hdefazio]

What this PR does / why we need it:
Accidentally left out the sed command from #477
Added shell options to the scripts so they would correctly report errors in the CI

Re-running failed tests

• /rerun-all - rerun all failed workflows.
• /rerun-workflow <workflow name> - rerun a specific failed workflow. Only one workflow name can be specified. Multiple /rerun-workflow commands are allowed per comment.

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: hdefazio

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[hdefazio]

/rerun-workflow e2e-raw

[hdefazio]

/rerun-workflow e2e-raw

[openshift-ci]

@hdefazio: The following tests failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
ci/prow/e2e-fast	cb98a79	link	true	/test e2e-fast
ci/prow/e2e-slow	cb98a79	link	true	/test e2e-slow
ci/prow/e2e-raw	cb98a79	link	true	/test e2e-raw

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[VedantMahabaleshwarkar]

/lgtm