MCMPHandler must convert ttl from seconds to milliseconds

ModCluster handles ttl in milliseconds. Client sends ttl in seconds, but MCMPHandler does not convert the incoming value to milliseconds. Setting the ttl to 600 - client-side - results in a ttl of 0.6 seconds in undertow. This is not as intended.

To keep DUMP and INFO output similar to that of apache httpd mod_cluster, MCMPInfoUtil should convert ttl from milliseconds to seconds. MCMPWebManager should match that behaviour.