Hmm, I don't think they will be renewed, because having the certs issued is a whole seperate matter from just installing vSphere/vCenter. However they might still work through that end-date.
It also depends on who the cert was originally issued by....
This link might help
Hope this helps.
Have performed many vCenter 4 to 5 upgrades...SSL certs have not been replaced by the vCenter 5 installer. Note however that the certificates in my case were issued by a trusted certificate authority and were not the default VMware self-signed certs (though I can't see how that would make a difference).