Test error cases and increase coverage

[IbraheemAlSaady]

Proper testing for error handling on client sets needs to be added.

We can leverage the Fake library which is already being used. Here is an example for simulating a failure in creating a service account

import (
  fakecorev1 "k8s.io/client-go/kubernetes/typed/core/v1/fake"
)

....

kube.ClientSet.CoreV1().(*fakecorev1.FakeCoreV1).PrependReactor("create", "serviceaccounts", func(action testing.Action) (handled bool, ret runtime.Object, err error) {
  return true, &v1.ServiceAccount{}, errors.New("Error creating service account")
})

Unit tests needs to be adjusted to create additional workflows with error