These messages are Cosmetic and has no production impact .
it is a new feature which enables by default a pool of Trusted CA certificates , called ( trust pools ) exactly like the ones we have on IE and Firefox Browsers .
The syslog's are very generic in nature and can be safely ignored, they result from having one of the certificates bundled with IOS being about to expire.
These certificates are meant to be used when the Smart Call-Home feature is used.
There will be no consequences on the router operations. In general the Trust Pools are and as there name show, a Pool of Trusted CA Certificates, this is a pool that can get updated automatically from Cisco.Com if enabled and configured properly.