Fix no package data included in rpm packaging

Fix no package data included in rpm packaging

If no python-setuptools dependence, `python setup install` will use
Distutils.

MANIFEST.in tells Distutils what files to include in
the source distribution but it does not directly affect what files
are installed.

We can continue using Distutils, and give parameter pakckage_data={}
in setup method in setup.py; or we use python-setuptools and
include_package_data=True parameter in it, we choose the latter since
it is more flexible.

Change-Id: I6dfb12cf7d0cf78a2fb0213a9812e4a33ce02b84