docs example (on changing severity on 'Anti Google Hacking - 2' policy does not work from API

Nadie ha tomado este issue todavía.

This is the DOCs example:

`
MX Web Service Custom Policy Class

>>> pol = mx.get_web_service_custom_policy("Anti Google Hacking - 2")
>>> pol.Severity
u'high'
>>> pol.Severity = 'medium'
>>> pol.ApplyTo
[]
>>> ws

>>> pol.ApplyTo = [ws]
>>> pol.ApplyTo
[]
>>> # Create user defined copy of policy
>>> pol_dict = dict(pol)
>>> pol_dict['Name'] = 'user defined - %s' % pol_dict['Name']
>>> mx.create_web_service_custom_policy(**pol_dict)

`

In reality, one gets:

`

pol = mx.get_web_service_custom_policy("Anti Google Hacking - 2")

pol
Out[388]:

pol.Severity
Out[389]: 'high'

pol.Severity = 'medium'
Traceback (most recent call last):

File "", line 1, in
pol.Severity = 'medium'

File "/anaconda3/lib/python3.7/site-packages/imperva_sdk-0.2.0-py3.7.egg/imperva_sdk/WebServiceCustomPolicy.py", line 154, in Severity
self._connection._update_web_service_custom_policy(Name=self._Name, Parameter='severity', Value=Severity)

File "/anaconda3/lib/python3.7/site-packages/imperva_sdk-0.2.0-py3.7.egg/imperva_sdk/MxConnection.py", line 934, in _update_web_service_custom_policy
return WebServiceCustomPolicy._update_web_service_custom_policy(connection=self, Name=Name, Parameter=Parameter, Value=Value)

File "/anaconda3/lib/python3.7/site-packages/imperva_sdk-0.2.0-py3.7.egg/imperva_sdk/WebServiceCustomPolicy.py", line 337, in _update_web_service_custom_policy
connection._mx_api('PUT', '/conf/webServiceCustomPolicies/%s' % Name, data=json.dumps(body))

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 is a predefined ADC item that cannot be changed', 'error-code': 'IMP-10146'}]

`

Executed on latest release as of now.

Revisa el ejemplo documentado de custom-policy junto con imperva_sdk/WebServiceCustomPolicy.py, especialmente el setter de Severity y el método update, así como MxConnection.py, donde se realiza la solicitud a la API. Reproduce la actualización de predefined-policy según el comportamiento de la API informado y determina si la documentación o el comportamiento del SDK es inconsistente, y verifica el ejemplo o manejo corregido.

Escrito por el modelo de indexación a partir del texto del issue.