presubmit build have one extra argument

[Jeffwan]

/bin/bash -c /mnt/test-data-volume/kubeflow-xgboost-operator-presubmit-build-70-9aa764f-7905-1ef1/src/kubeflow/xgboost-operator//build_image.sh 

/mnt/test-data-volume/kubeflow-xgboost-operator-presubmit-build-70-9aa764f-7905-1ef1/src/kubeflow/xgboost-operator/Dockerfile 
gcr.io/kubeflow-ci/xgboost-operator 
v1.0

In build_image.sh scripts, we only consume two arguments. https://github.com/kubeflow/xgboost-operator/blob/78f8cf50bb943247e038a8feb5a9f7e47d810d65/build_image.sh#L10-L12

If we add extra argument, it will v1.0 will be assigned which may brings problems. I meet this problem working on https://github.com/kubeflow/xgboost-operator/pull/70

At the beginning, I use TIMEOUT=${3-:30m} then it grants v1.0 to timeout and fail the test.

I think we can either delete v1.0 tag, since build_image.sh generate dirty tags here

https://github.com/kubeflow/xgboost-operator/blob/78f8cf50bb943247e038a8feb5a9f7e47d810d65/build_image.sh#L16

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Label	Probability
kind/bug	0.91

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