[occm] Revert dnsPolicy to Default for occm

[ericgraf]

What this PR does / why we need it: Reverts the default value for dnsPolicy.

This is needed during bootstrapping of new clusters where new clusters can't come up due to this change.

Which issue this PR fixes(if applicable): fixes #2611

Special notes for reviewers:

Release note:

[openstack-cloud-controller-manager] Revert Default value for dnsPolicy back to Default ```

[linux-foundation-easycla[bot]]

• :white_check_mark:login: ericgraf / (369b669bc4640903d1240c199428c03542505d2a)

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[jichenjc]

/ok-to-test

[zetaab]

/hold

there are also other files that should be reverted. I will check this currently