Add OVN TLS certs for metadata agent

[olliewalsh]

Metadata agent requires TLS certs to access the southdb. Also cleanup dup volume mounts in ovn services.

[openshift-ci[bot]]

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[softwarefactory-project-zuul[bot]]

Build failed (check pipeline). Post recheck (without leading slash) to rerun all jobs. Make sure the failure cause has been resolved before you rerun jobs.

https://review.rdoproject.org/zuul/buildset/474c2b62dbbd4e9198d2a4420e783da7

:heavy_check_mark: openstack-k8s-operators-content-provider SUCCESS in 2h 03m 30s :x: podified-multinode-edpm-deployment-crc FAILURE in 1h 24m 02s :heavy_check_mark: cifmw-crc-podified-edpm-baremetal SUCCESS in 1h 40m 51s :heavy_check_mark: edpm-ansible-molecule-edpm_bootstrap SUCCESS in 5m 36s :heavy_check_mark: edpm-ansible-molecule-edpm_podman SUCCESS in 4m 34s :heavy_check_mark: edpm-ansible-molecule-edpm_module_load SUCCESS in 4m 29s :heavy_check_mark: edpm-ansible-molecule-edpm_kernel SUCCESS in 9m 29s :heavy_check_mark: edpm-ansible-molecule-edpm_libvirt SUCCESS in 7m 47s :heavy_check_mark: edpm-ansible-molecule-edpm_nova SUCCESS in 8m 10s :heavy_check_mark: edpm-ansible-molecule-edpm_frr SUCCESS in 6m 15s :heavy_check_mark: edpm-ansible-molecule-edpm_iscsid SUCCESS in 4m 16s :heavy_check_mark: edpm-ansible-molecule-edpm_ovn_bgp_agent SUCCESS in 6m 14s :heavy_check_mark: edpm-ansible-molecule-edpm_ovs SUCCESS in 4m 53s

[olliewalsh]

Confirmed metadata API now works in a TLS deployment:

~/install_yamls/devsetup$ ssh 192.168.122.207 -l cirros
cirros@192.168.122.207's password: 
$ curl http://169.254.169.254/openstack
2012-08-10
2013-04-04
2013-10-17
2015-10-15
2016-06-30
2016-10-06
2017-02-22
2018-08-27
2020-10-14
latest$ 

[vakwetu]

/lgtm