add delay to update script
add delay to update script

caused by error emails being fired, suggested solr hasn't started up properly yet after the rake task exits

SynthSys/seek,HITS-SDBV/seek,HITS-SDBV/seek,stuzart/seek,HITS-SDBV/seek,stuzart/seek,HITS-SDBV/seek,stuzart/seek,SynthSys/seek,SynthSys/seek,SynthSys/seek