Fix missing comma

Author: ktbyers

setup.py

@@ -19,7 +19,7 @@
     author="David Barroso, Kirk Byers, Mircea Ulinic",
     author_email="[email protected], [email protected], [email protected]",
     description="Network Automation and Programmability Abstraction Layer with Multivendor support",
-    license = "Apache-2.0"
+    license = "Apache-2.0",
     long_description=long_description,
     long_description_content_type="text/markdown",
     classifiers=[