Do not merge: Poll for snaphandle every second

[sseago]

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[openshift-ci]

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[openshift-ci]

@sseago: The following tests failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
ci/prow/unit-test	656757c	link	false	/test unit-test
ci/prow/lint	656757c	link	true	/test lint

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[sseago]

@weshayutin image is built here: quay.io/spampatt/velero:csi-polling