Enabled the unit test

[mkumatag]

What this PR does / why we need it:
Enabled the quick sanity unit test during the CI, will give additional confidence on the code
Removed the storage for the older version of v1alpha3 which is not required, no 2 versions can have storage at the same time.

Which issue(s) this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged):
Fixes #

Specify your PR reviewers:

/cc @gyliu513 @jichenjc @xunpan @wentao-zh

Special notes for your reviewer:

/area provider/ibmcloud

Not sure anyone really using the v1alpha3 version anywhere in the production, if required I'll look into conversion logic to generate(though the specs are same for both v1alpha3 and v1alpha4 as of now)

1. Please confirm that if this PR changes any image versions, then that's the sole change this PR makes.

Release note:

NONE

[k8s-ci-robot]

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In response to this:

What this PR does / why we need it:
Enabled the quick sanity unit test

Which issue(s) this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged):
Fixes #

Specify your PR reviewers:

/cc @gyliu513 @jichenjc @xunpan @wentao-zh

Special notes for your reviewer:

/area provider/ibmcloud

1. Please confirm that if this PR changes any image versions, then that's the sole change this PR makes.

Release note:

NONE

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[gyliu513]

/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: gyliu513, mkumatag

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[mkumatag]

Follow up tasks created
#328
#329