testing: Fix e2e test job name

[hakman]

Broken in 553509b

-       return fmt.Sprintf("%v.%v", jobName, suffix), nil
+
+       if suffix != "" {
+               jobName = jobType + "." + suffix
+       }
+
+       return jobName, nil

[hakman]

/cc @rifelpet @ameukam

[hakman]

/approve

[k8s-ci-robot]

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[hakman]

All tests failed due to the broken test, updating regex...

[hakman]

All tests passing, ready to merge.

[ameukam]

/lgtm