Organized the distaflibs directory tree to accomodate namespace packages.

* Allows multiple distaf library packages to install in single namespace package.
- Created distaflibs-gluster directory as root for package configs, docs, etc.
- Created setup.py file to install distaflibs-gluster package into namespace.
- Created distaflibs-gluster/distaflibs namespace package dir and init.
- Created distaflibs-gluster/distaflibs/gluster as package dir.
- Copied distaf gluster library files into package dir.

Requires the distaf package.

distaflibs-gluster installs into /usr/lib/python2.7/site-packages/distaflibs/gluster

Change-Id: I775c4f1526880ea606f35c3616abb9aaf2f3b886
BUG: 1330346
Signed-off-by: Jonathan Holloway <jholloway@redhat.com>
Reviewed-on: http://review.gluster.org/13972
Smoke: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: M S Vishwanath Bhat <vbhat@redhat.com>
CentOS-regression: Gluster Build System <jenkins@build.gluster.com>
NetBSD-regression: NetBSD Build System <jenkins@build.gluster.org>

Since it was decided to have distaf test cases and related
libraries inside of glusterfs.git, this patch has the basic
skeleton directory structure and few of the libs.

Please note that, this patch by itself will not enable to
run any distaf tests right away. The distaf package needs to
be installed from the github.com/gluster/distaf. Once that
package is installed, it will put all the libs into respective
standard location and only then the tests in this patch can be
executed.

The plan to have distaf_libs packaged or installable using setup.py
This will enable tests to assume that all the libs are present in
the standard location.

Change-Id: I925ac0ad7e9cf6164c4380319a1f786b5241c74a
Signed-off-by: M S Vishwanath Bhat <msvbhat@gmail.com>
Reviewed-on: http://review.gluster.org/13853
Smoke: Gluster Build System <jenkins@build.gluster.com>
Tested-by: Raghavendra Talur <rtalur@redhat.com>
NetBSD-regression: NetBSD Build System <jenkins@build.gluster.org>
CentOS-regression: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Raghavendra Talur <rtalur@redhat.com>