LU-1943 fld: Simplify transaction handling in FID/FLD

LU-1943 fld: Simplify transaction handling in FID/FLD

This is port of ORI-107 to the master
- cleanup FID/FLD transaction handling, fix IGIF_FLD_RANGE start value
- use th_local in all places where transno is not needed
- remove mti_no_need_transno flag

Signed-off-by: Mikhail Pershin <tappro@whamcloud.com>
Change-Id: I4647dd7f8cd33b836cc959a9f74610c9fbc0e29c
Reviewed-on: http://review.whamcloud.com/4172
Tested-by: Hudson
Tested-by: Maloo <whamcloud.maloo@gmail.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: wangdi <di.wang@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>