Remove IgnoreErr options from the Import/Export function called via web API

[196Ikuchil]

What type of PR is this?

/kind bug

What this PR does / why we need it:

In #103, I have added the IgnoreErr option to the Import/Export functions called via web API.
But the IgnoreErr option was going to use for another logic (Only for Importing the existing Cluster's resources.)
When we call it via web API, it should return an error if an error has occurred.
Since the current usage of the function is incorrect, I fixed it.

And also, I found a typo in the test function's name.

Which issue(s) this PR fixes:

Fixes #103

Special notes for your reviewer:

/label tide/merge-method-squash

[k8s-ci-robot]

Hi @196Ikuchil. Thanks for your PR.

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[196Ikuchil]

Sorry, this is my mistake..

[sanposhiho]

Oh, nice catch.
/lgtm
/approve
/ok-to-test

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: 196Ikuchil, sanposhiho

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