Add OpenStack trove classifier for PyPI

Add trove classifier to have the client listed among the
other OpenStack-related projets on PyPI.

Change-Id: Ic07fa4b3717a41fdd74c7447d65037dee7ea7fb7

setup.py

@@ -98,6 +98,16 @@ setuptools.setup(
     description=ShortDescription,
     long_description=Description,
     license=License,
+    classifiers=[
+        'Environment :: OpenStack',
+        'Intended Audience :: Developers',
+        'Intended Audience :: Information Technology',
+        'License :: OSI Approved :: Apache Software License',
+        'Operating System :: POSIX :: Linux',
+        'Programming Language :: Python',
+        'Programming Language :: Python :: 2',
+        'Programming Language :: Python :: 2.7',
+    ],
     scripts=ProjectScripts,
     install_requires=requires,
     dependency_links=depend_links,