ddclient: T5852: add missing priority

[c-po]

Change Summary

Running ddclient on a VLAN interface will fail during reboot as there is no discrete priority to tell that the dynamic DNS service needs to be started after the interfaces.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Code style update (formatting, renaming)
• Refactoring (no functional changes)
• Migration from an old Vyatta component to vyos-1x, please link to related PR inside obsoleted component
• Other (please describe):

Related Task(s)

• https://vyos.dev/T5852

Related PR(s)

Component(s) name

ddclient (DNS DYNAMIC)

Proposed changes

How to test

Smoketest result

cpo@LR1.wue3:~$ /usr/libexec/vyos/tests/smoke/cli/test_service_dns_dynamic.py
test_01_dyndns_service_standard (__main__.TestServiceDDNS.test_01_dyndns_service_standard) ... ok
test_02_dyndns_service_ipv6 (__main__.TestServiceDDNS.test_02_dyndns_service_ipv6) ... ok
test_03_dyndns_service_dual_stack (__main__.TestServiceDDNS.test_03_dyndns_service_dual_stack) ... ok
test_04_dyndns_rfc2136 (__main__.TestServiceDDNS.test_04_dyndns_rfc2136) ... ok
test_05_dyndns_hostname (__main__.TestServiceDDNS.test_05_dyndns_hostname) ... ok
test_06_dyndns_web_options (__main__.TestServiceDDNS.test_06_dyndns_web_options) ... ok
test_07_dyndns_dynamic_interface (__main__.TestServiceDDNS.test_07_dyndns_dynamic_interface) ... ok
test_08_dyndns_vrf (__main__.TestServiceDDNS.test_08_dyndns_vrf) ... ok

----------------------------------------------------------------------
Ran 8 tests in 52.965s

OK

Checklist:

• I have read the CONTRIBUTING document
• I have linked this PR to one or more Phabricator Task(s)
• I have run the components SMOKETESTS if applicable
• My commit headlines contain a valid Task id
• My change requires a change to the documentation
• I have updated the documentation accordingly

[c-po]

@Mergifyio backport sagitta equuleus

[mergify]

backport sagitta equuleus

✅ Backports have been created

• #2705 ddclient: T5852: add missing priority (backport #2703) has been created for branch sagitta
• #2706 ddclient: T5852: add missing priority (backport #2703) has been created for branch equuleus