fix(pam_ldap): Fix nscd service restart with state check
Sometimes the nscd service does not exist yet when running a playbook the first time.
The fix from https://github.com/codeenigma/ce-provision/pull/2693 was not correct, as the variable _nscd_service_check is defined is always defined.
Error in playbook:
TASK [debian/pam_ldap : Restart nscd service.] *********************************
fatal: [server.example.com]: FAILED! =>
changed: false
msg: 'Could not find the requested service nscd: host'