EX-2818 lipe: Parse arguments and config file

EX-2818 lipe: Parse arguments and config file

Add the code to parse arguments and config file, and some arguments.
Add the framework of wait-scan-free.

Change-Id: I792715badcb5a1fb1aa9062f04c2afab3229b747
Signed-off-by: Lei Feng <flei@whamcloud.com>
Test-Parameters: trivial
Reviewed-on: https://review.whamcloud.com/43194
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: John L. Hammond <jhammond@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>