pki: T6241: do not call dependency before its initialization (backport #3327)

[mergify]

Change Summary

Fixes PKI issue identified by smoketest, credit to @jestabro

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)

Related PR(s)

• pki: T6241: Fix dependency updates on PKI changes #3311

Component(s) name

pki

Proposed changes

How to test

Smoketest result

DEBUG - Running Testcase: /usr/libexec/vyos/tests/smoke/cli/test_vpn_ipsec.py
DEBUG - test_dhcp_fail_handling (__main__.TestVPNIPsec.test_dhcp_fail_handling) ... ok
DEBUG - test_dmvpn (__main__.TestVPNIPsec.test_dmvpn) ... ok
DEBUG - test_flex_vpn_vips (__main__.TestVPNIPsec.test_flex_vpn_vips) ... ok
DEBUG - test_remote_access (__main__.TestVPNIPsec.test_remote_access) ... ok
DEBUG - test_remote_access_dhcp_fail_handling (__main__.TestVPNIPsec.test_remote_access_dhcp_fail_handling) ... ok
DEBUG - test_remote_access_eap_tls (__main__.TestVPNIPsec.test_remote_access_eap_tls) ... ok
DEBUG - test_remote_access_x509 (__main__.TestVPNIPsec.test_remote_access_x509) ... ok
DEBUG - test_site_to_site (__main__.TestVPNIPsec.test_site_to_site) ... ok
DEBUG - test_site_to_site_vti (__main__.TestVPNIPsec.test_site_to_site_vti) ... ok
DEBUG - test_site_to_site_x509 (__main__.TestVPNIPsec.test_site_to_site_x509) ... ok
DEBUG -
DEBUG - ----------------------------------------------------------------------
DEBUG - Ran 10 tests in 162.508s
DEBUG -
DEBUG - 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

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This is an automatic backport of pull request #3327 done by [Mergify](https://mergify.com).