fixed route variable syntax

inventory_provider/routes/poller.py

@@ -84,7 +84,7 @@ def poller_interface_oids(hostname):
     return jsonify(result)
 
 
-@routes.route('/services/{category}', methods=['GET', 'POST'])
+@routes.route('/services/<category>', methods=['GET', 'POST'])
 @common.require_accepts_json
 def service_category_interfaces(category):