client: Print more generic message when forcing cache validation
client: Print more generic message when forcing cache validation

- Change the initial message printed from check_damaged_cache() not to
say that the parcel was shut down unexpectedly, since the dirty bit could
have been set due to Nexus chunk errors

cmusatyalab/openisr,cmusatyalab/openisr,cmusatyalab/openisr,cmusatyalab/openisr,cmusatyalab/openisr