for a missing license (say, product is only WAF licensed), the library is not gracefully treating errors

simple export functions error out:

source_export = mx.export_to_json()
Traceback (most recent call last):

File "", line 1, in
source_export = mx.export_to_json()

File "/anaconda3/lib/python3.7/site-packages/imperva_sdk-0.2.0-py3.7.egg/imperva_sdk/MxConnection.py", line 2152, in export_to_json
site_dict = dict(site)

File "/anaconda3/lib/python3.7/site-packages/imperva_sdk-0.2.0-py3.7.egg/imperva_sdk/core.py", line 43, in iter
iters[child_title].append(dict(child))

File "/anaconda3/lib/python3.7/site-packages/imperva_sdk-0.2.0-py3.7.egg/imperva_sdk/core.py", line 40, in iter
children = get_all_function()

File "/anaconda3/lib/python3.7/site-packages/imperva_sdk-0.2.0-py3.7.egg/imperva_sdk/ServerGroup.py", line 198, in get_all_db_services
return self._connection.get_all_db_services(Site=self._Site, ServerGroup=self.Name)

File "/anaconda3/lib/python3.7/site-packages/imperva_sdk-0.2.0-py3.7.egg/imperva_sdk/MxConnection.py", line 411, in get_all_db_services
return DbService._get_all_db_services(connection=self, ServerGroup=ServerGroup, Site=Site)

File "/anaconda3/lib/python3.7/site-packages/imperva_sdk-0.2.0-py3.7.egg/imperva_sdk/DbService.py", line 100, in _get_all_db_services
res = connection._mx_api('GET', '/conf/dbServices/%s/%s' % (Site, ServerGroup))

File "/anaconda3/lib/python3.7/site-packages/imperva_sdk-0.2.0-py3.7.egg/imperva_sdk/MxConnection.py", line 257, in _mx_api
raise MxException("MX returned errors - %s" % str(error_message))

MxException: MX returned errors - [{'description': 'This feature is currently not licensed.', 'error-code': 'IMP-10129'}]

Inizia da export_to_json in MxConnection.py e segui il traceback attraverso core.py, ServerGroup.py e DbService.py per riprodurre la risposta relativa alla funzionalità senza licenza. Determina la gestione corretta prevista per IMP-10129 e verifica che il percorso di esportazione non fallisca più con l'errore non gestito mostrato.