LU-8040 mgc: Apply changelog defaults values in mdd_init0()

LU-8040 mgc: Apply changelog defaults values in  mdd_init0()

lctl set_param -P command stores options to params file. This options
are applied in server_start_targets() during target mount. Changelog
apply default options during initialization. So it reset options
applied by "lctl set_param -P".

This patch moves changelogs default value appying before params
processing. So new parameters aplied after default.

Signed-off-by: Artem Blagodarenko <artem.blagodarenko@seagate.com>
Change-Id: Ibb1a8d512844d4fcb66c051441c1864f994d4ded
Reviewed-on: http://review.whamcloud.com/19854
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Reviewed-by: Sebastien Buisson <sbuisson@ddn.com>
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>