RFR(XXS) 8187979 Clean up info printing at CDS dump time

[Ioi Lam]

A small clean up to removed obsolete info and improve indentation

  * https://bugs.openjdk.java.net/browse/JDK-8187979
  * http://cr.openjdk.java.net/~iklam/jdk10/8187979-dump-info-cleanup.v01/

Webrev doesn't show the lines that has only changes in blank spaces, but 
you can see the full diff here:

  * http://cr.openjdk.java.net/~iklam/jdk10/8187979-dump-info-cleanup.v01/open.patch

Thanks

- Ioi