LU-9443 mdd: omit changelog records for volatile files

LU-9443 mdd: omit changelog records for volatile files

Omit changelog records for volatile files. Policy engines need not be
concerned with these files.

Signed-off-by: John L. Hammond <john.hammond@intel.com>
Change-Id: Id28db03e0bd6e477db8de1bab1d53688ac7720dd
Reviewed-by: Faccini Bruno <bruno.faccini@intel.com>
Signed-off-by: Minh Diep <minh.diep@intel.com>
Reviewed-on: https://review.whamcloud.com/26931
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Alex Zhuravlev <alexey.zhuravlev@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>