[validator] Validate quoted local part of email addresses

 Test for validate quoted local parts following the RFC 5321
[validator] Validate quoted local part of email addresses

 Fix for the validator issue
Merge branch 'hotfix/4790'

Close #4790
Merge pull request #4793 from Maks3w/hotfix/mail-validator

[validator] Validate quoted local part of email addresses
Merge branch 'hotfix/4793' into develop

Forward port #4793