1. Add checkpoint in snapshot E2E test to verify snapshot CR should be created and snapshot should be created in cloud side after backup completion;
2. Fix snapshot name issue that CSI snapshot name in cloud side is not the same with other non-CSI cloud snapshots;
Signed-off-by: danfengl <danfengl@vmware.com>
By now, only busybox:latest is used by e2e. It is already upload to gcr.io/velero-gcp/busybox:latest
Change the image to gcr.io to avoid pulling rate limitation from docker hub.
Signed-off-by: Xun Jiang <jxun@vmware.com>