add missing whens to velero steps
I ran into some when
's that were missing when I tried to update the oas.greenhost.net
cluster. Re-running the playbook when velero was enabled and did not need an update lead to this error:
TASK [apps : Unpack velero CLI] ***********************************************************************************************************************************************************************************
Wednesday 07 April 2021 12:19:56 +0200 (0:00:00.038) 0:00:27.263 *******
fatal: [oas.greenhost.net]: FAILED! => changed=false
msg: Source '/tmp/velero-v1.4.0.tar.gz' does not exist
This MR fixes that.