Just wanted to let the community know (and hopefully GoDaddy as they may need to do some work on their hypervisors) that I ran into this problem today after a yum update.
The gist is that if you try to start Dovecot on your CentOS 7 VPS and it appears to start normally, then dies a minute and a half or so later, you've been bit by the above linked issue.
I used the workaround #2 here and that fix seems to work OK for me. In any case, I think the right fix might be a GoDaddy update of the VPS hardware nodes.
I'm hoping a mod will get this to the right folks at GoDaddy because I can't seem to get a chat started with them and can't find an email address to send a note to support.