use newer version of jsonschema

older versions don't know about draft > 4
(exlusiveMin.../Max... have different syntax)

requirements.txt

 click
 mysql-connector
 pysnmp
-jsonschema
+jsonschema==3.2.0
 paramiko
 flask
 redis==3.2.1

setup.py

@@ -13,7 +13,7 @@ setup(
         'click',
         'mysql-connector',
         'pysnmp',
-        'jsonschema',
+        'jsonschema==3.2.0',
         'paramiko',
         'flask',
         'redis==3.2.1',