BEE Backport regress/scripts/bconsole.py

BEE Backport regress/scripts/bconsole.py

This commit is the result of the squash of the following main commits:

Author: Alain Spineux <alain@baculasystems.com>
Date:   Fri Oct 21 16:11:47 2016 +0200

    regress: make regress python friendly

    - modules like bconsole.py and blab.py goes in regress/scrips
    - regress/tests/regress.py is a helper that load modules in scripts
      without boring with librady path
    - py-sample-test.py is the first sample
    - add new objects lab.{fd,sd,dir} that are manage the related Daemon
    - add lab.sd.dde of class DDE that provides some basic helper for the DDE
    - file FileReader can search a log  or trace file
    - lab.GetVolume(volname) return information about a volume