make options for sources optional

lemur/sources/views.py

@@ -156,12 +156,19 @@ class SourcesList(AuthenticatedResource):
            :reqheader Authorization: OAuth token to authenticate
            :statuscode 200: no error
         """
+        if "plugin_options" in data["plugin"]: 
             return service.create(
                 data["label"],
                 data["plugin"]["slug"],
                 data["plugin"]["plugin_options"],
                 data["description"],
             )
+        else:
+            return service.create(
+                data["label"],
+                data["plugin"]["slug"],
+                data["description"],
+            )
 
 
 class Sources(AuthenticatedResource):