Move password retrieval to openstack_test.go

[tedyu]

What type of PR is this?
/kind bug

What this PR does / why we need it:
Fixes #81117 by moving password retrieval to test.

Which issue(s) this PR fixes:
Fixes #81117

NONE

Additional documentation e.g., KEPs (Kubernetes Enhancement Proposals), usage docs, etc.:

[liggitt]

note that this exists to be compatible with https://docs.openstack.org/newton/user-guide/common/cli-set-environment-variables-using-openstack-rc.html

just because we're not using it in-tree doesn't mean it is not in use.

I'll defer to @dims / @kubernetes/provider-openstack-misc on assessing the risk of dropping this

[dims]

/assign @chrigl @adisky
/lgtm

yes, let's do this please!. it's ok to drop that support.

[dims]

/priority important-soon
/milestone v1.17

[liggitt]

@dims - this needs approval if it will merge in 1.17. Looks like you have approve on the package.

[dims]

/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: dims, tedyu

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