LU-1415 utils: Process all {get,set}_param arguments

LU-1415 utils: Process all {get,set}_param arguments

Process all arguments to get_param and set_param before returning an
error, to allow accessing one of multiple parameters that have changed
during code reorganization.

Signed-off-by: Andreas Dilger <adilger@whamcloud.com>
Signed-off-by: Li Wei <liwei@whamcloud.com>
Change-Id: Icb3019c8bd6ed83ffbfeae1fa54084f34df00c1e
Reviewed-on: http://review.whamcloud.com/3245
Tested-by: Hudson
Reviewed-by: Yu Jian <yujian@whamcloud.com>
Tested-by: Maloo <whamcloud.maloo@gmail.com>