🏃 Remove disablePortSecurity: false from template

[hidekazuna]

What this PR does / why we need it:

This PR removes disablePortSecurity: false from template files. Because disablePortSecurity is false by default.

Which issue(s) this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged):
Fixes #

Special notes for your reviewer:

1. Please confirm that if this PR changes any image versions, then that's the sole change this PR makes.

TODOs:

• squashed commits
• if necessary:
  • includes documentation
  • adds unit tests

Release note:

/hold

[sbueringer]

/test pull-cluster-api-provider-openstack-make-conformance
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: hidekazuna, sbueringer

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• OWNERS [hidekazuna,sbueringer]

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[jichenjc]

/lgtm
/hold cancel