Verify that the files are placed after issuing the certificate when starting in init mode.

[y-myajima]

When starting in init mode, error handling is performed in case an error occurs during certificate issuance. However, after normal execution completes, there is no verification to ensure that the certificate has actually been placed. To guarantee that the certificate is placed when SIA starts and completes successfully in init mode, it is necessary to verify after the certificate issuance.