Ported commits from castor/master:

3a67b08bd5b0e0cf4ef03de8185630fb0bcc5e80
  CASTOR-5275 RFE: Log the tapeserverd tape-file descriptor if it
  becomes bad whilst waiting for a tape drive to become ready

  Fixed.

b5d562503b6f954cfc6be09ef742474c685e6d60
  CASTOR-5275 RFE: Log the tapeserverd tape-file descriptor if it becomes
  bad whilst waiting for a tape drive to become ready

  Differentiated the log messages, and added the file descriptor
  logging in  all instances of the Could not read drive status errors.