Change in vdsm[master]: confmeta: Add confmeta module

[Code Review]

From Dan Kenigsberg :

Dan Kenigsberg has submitted this change and it was merged.

Change subject: confmeta: Add confmeta module
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confmeta: Add confmeta module

This module handles configuration files managed by vdsm, using a
metadata comments header.

Example file:

# This file is managed by vdsm
    # description...
    #REVISION: 3
    #PRIVATE: NO

file contents...

Example usage:

>>> from vdsm.tool import confmeta
    >>>> confmeta.read_metadata(path)
    ConfigMetadata(revision=3, private=False)

This module will be used to manage lvmlocal.conf file, and later will
replace the system used to manage multiapth.conf.

Change-Id: Icbd590853ca0acc47acd7823daf39931cd617638
Bug-Url: https://bugzilla.redhat.com/1374545
Signed-off-by: Nir Soffer 
---
M lib/vdsm/tool/Makefile.am
A lib/vdsm/tool/confmeta.py
M tests/Makefile.am
A tests/tool_confmeta_test.py
M vdsm.spec.in
5 files changed, 259 insertions(+), 1 deletion(-)

Approvals:
  Piotr Kliczewski: Looks good to me, but someone else must approve
  Nir Soffer: Verified; Passed CI tests
  Dan Kenigsberg: Looks good to me, approved

Objections:
  Yaniv Bronhaim: I would prefer that you didn't submit this
  Jenkins CI: Failed CI tests