python-mock: Add recipe for v1.0.1 and dependencies

:Release Notes:
We need python-mock within our tests written in python and executed
in our special networking test image.

:Detailed Notes:
python-mock needs some dependencies which are also added with this
change. All recipes are taken from meta-openstack (see http://git.
yoctoproject.org/cgit/cgit.cgi/meta-cloud-services/tree/meta-
openstack/recipes-devtools/python/).

:Testing Performed:
Build tested and verified at runtime the python mock module is
loadable and no dependency is missing.

:QA Notes:
No change to image

:Issues Addressed:
[BHV-7186] Import python-mock recipe to meta-webos

Open-webOS-DCO-1.0-Signed-off-by: Simon Busch <simon.busch@lge.com>

Change-Id: Id537b046958d4ae8fb76355d5255f83aa1179ddf
Reviewed-on: https://g2g.palm.com/5587
Reviewed-by: DCO Verification
Tested-by: Simon Busch <simon.busch@lge.com>
Reviewed-by: Martin Jansa <Martin.Jansa@lge.com>
Reviewed-by: Susan Montooth <susan.montooth@lge.com>