Add dib-lint exclusions
Add dib-lint exclusions

This patch adds exclusions for the indentation and newline
rules in dib-lint.  The indentation exclusion is needed for
files using heredoc and wanting to preserve indentation.
The newline exclusion is added here for consisently treating
all dib-lint rules the same.

Change-Id: Ic8a2164eba3cf99e55473846e3a5fe663a3c1095

eantyshev/diskimage-builder,CSC-IT-Center-for-Science/diskimage-builder,openstack/diskimage-builder,rdo-management/diskimage-builder,varunarya10/diskimage-builder,openstack/diskimage-builder,takahashinobuyuki/diskimage-builder,switch-ch/diskimage-builder,JioCloud/diskimage-builder,JioCloud/diskimage-builder,CSC-IT-Center-for-Science/diskimage-builder,zioproto/diskimage-builder,takahashinobuyuki/diskimage-builder,varunarya10/diskimage-builder,eantyshev/diskimage-builder,switch-ch/diskimage-builder,rdo-management/diskimage-builder,NaohiroTamura/diskimage-builder,zioproto/diskimage-builder,NaohiroTamura/diskimage-builder