gcp_janitor deletes instances first causing some recreates

[oxddr]

What happened:
gcp_janitor deleted all instances first. Some of them belonged to managed instance groups, so they were recreated and deleted few seconds later when IGM has been deleted.

What you expected to happen:
Only non-managed instances should be deleted first or managed instance groups should be deleted before instances.

How to reproduce it (as minimally and precisely as possible):
create clusters on GCE using kube-up and clean it up with gcp_janitor/

Please provide links to example occurrences, if any:
n/a

Anything else we need to know?:
-

[ixdy]

/area boskos

[ixdy]

Moving to kubernetes-sigs/boskos#19.
/close

[k8s-ci-robot]

@ixdy: Closing this issue.

In response to this:

Moving to kubernetes-sigs/boskos#19.
/close

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