MRP-1982 mdt: 'lfs catinfo deletions' leads to MDS crash

If mdt_handler is defined for some opcode, than .mh_act
must be defined also.

Remove obsolete definitions.

Change-Id: I80a7c81abdd00ad5c8068c7623bb80d826bdd93d
Signed-off-by: Andriy Skulysh <Andriy_Skulysh@xyratex.com>
Reviewed-on: http://es-gerrit.xyus.xyratex.com:8080/3226
Tested-by: Jenkins
Reviewed-by: Alexander Boyko <alexander_boyko@xyratex.com>
Tested-by: Alexander Lezhoev <alexander_lezhoev@xyratex.com>
Reviewed-by: Vitaly Fertman <vitaly_fertman@xyratex.com>
MRP-2054 obdfilter: fix filter_read_group_internal() error handling

tmp_subdirs->dentry[i] should contain only NULL or valid dentry.
dput() is called later on not NULL value.

Change-Id: I6dc54ad188bf281f59820deed93ad7c38705d1d8
Signed-off-by: Andriy Skulysh <Andriy_Skulysh@xyratex.com>
Reviewed-on: http://es-gerrit.xyus.xyratex.com:8080/3778
Reviewed-by: Sergey Cheremencev <sergey_cheremencev@xyratex.com>
Tested-by: Jenkins
Tested-by: Alexander Lezhoev <alexander_lezhoev@xyratex.com>
Reviewed-by: Vitaly Fertman <vitaly_fertman@xyratex.com>