fix namespace pkg setup

setup.py

@@ -1,4 +1,4 @@
-from setuptools import setup, find_packages
+from setuptools import setup, find_namespace_packages
 from json import load
 
 install_requires = open('requirements.txt').read().split('\n')
@@ -13,7 +13,7 @@ setup(
     author='Vahid Rezanezhad',
     url='https://github.com/qurator-spk/eynollah',
     license='Apache License 2.0',
-    packages=find_packages(exclude=['tests']),
+    packages=find_namespace_packages(include=['qurator']),
     install_requires=install_requires,
     package_data={
         '': ['*.json']