Fix Katib-launcher component with python file open issue

[Tomcli]

The current Katib-launcher component will break using the component.yaml since the outputfile's parent directory does not exist. Therefore, we need to create parent directory if it doesn't exist.

Note: This image is using python 2.7, so the exist_ok parameter is not yet available for os.makedirs.

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This change is 

[Tomcli]

/assign @hougangliu

[k8s-ci-robot]

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[animeshsingh]

/lgtm

[hougangliu]

/lgtm

[hougangliu]

/approve

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This pull-request has been approved by: hougangliu

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