default_icmp_type ApplicationObject incorrect vartype

Describe the bug

Failure to parse XML with refresh all on device groups.

Specifically the child object that fails is the ApplicationObject -> "default_icmp_type" VersionedParamPath.

This particular code piece fails:

elif self.vartype == "int":
    settings[self.param] = int(elm.text)

Under panos.base.ParamPath.parse_value_from_xml_last_tag line 3306.

The elm.text field fails to be translated to an integer with

Expected behavior

Parsing completes successfully.

Current behavior

`Traceback (most recent call last):
File "c:\git\Pan_OS_Tests\env\Lib\site-packages\panos\base.py", line 3307, in parse_value_from_xml_last_tag
settings[self.param] = int(elm.text)
^^^^^^^^^^^^^
ValueError: invalid literal for int() with base 10: '13,14'

Possible solution

Depending on how these params are handled downstream we can either:

1. Handle the exception for this particular conversion and instead save it as a string ignoring param types
2. Define appropriate param versions (set to None) for default_icmp_type for all affected Panorama versions.

Steps to reproduce

1. Build Panorama Object
2. Get all DeviceGroup Objects

    pa = Panorama("", api_username="",  api_password="") 

    dg_test = DeviceGroup()

    # Building device group as a child of Panorama
    pa.add(dg_test)

    # Get all device groups:
    device_groups = DeviceGroup.refreshall(dg_test)

Specifically this affects filters associated with icmp-timestamp. (Since that's both ICMP type 13 & 14).

Screenshots

N/A

Context

Just trying to get all devicegroups from Panorama.

Your Environment

• Version used: Panorama Version 10.1.12
• Environment name and version (e.g. Chrome 59, node.js 5.4, python 3.7.3): python 3.12.1
• Operating System and version (desktop or mobile): Windows 10
• Link to your project: N/A

Start at panos.base.ParamPath.parse_value_from_xml_last_tag around line 3306 and trace the definition of ApplicationObject's default_icmp_type. Reproduce the failure through DeviceGroup.refreshall with the icmp-timestamp value "13,14" on Panorama 10.1.12. Done means device-group refresh parses successfully without the ValueError and the chosen parameter handling matches downstream expectations.