[Let's Encrypt certificates]: Edge creation fails on stage of stopping nginx.service

Preconditions:

1. Create ssn is created with extra values:

 -conf_letsencrypt_enable true

 -conf_letsencrypt_domain_name

2. New cloud DNS is created for SSN

Steps to reproduce:

1. Create project
2. Create new cloud DNS for edge node

Actual result:

1. Project creation fails

Expected result:

1. Project creation is successful