Prevent $connector from getting serialized into the $details array

[alanhartless]

Please be sure you are submitting this against the staging branch.

Q	A
Bug fix?	y
New feature?
Automated tests included?
Related user documentation PR URL
Related developer documentation PR URL
Issues addressed (#s or URLs)
BC breaks?
Deprecations?

Description:

Somehow, Joomla's Http object is serialized for some but not for all IP address details.

Uncaught PHP Exception Doctrine\DBAL\Types\ConversionException: "Serialized array includes null-byte. This cannot be saved as a text. Please check if you not provided object with protected or private members. Serialized Array: a:11:{s:4:"city";s:6:"Tirana";s:6:"region";s:15:"Qarku i Tiranes";s:7:"zipcode";N;s:7:"country";s:7:"Albania";s:8:"latitude";d:41.3275;s:9:"longitude";d:19.8189;s:3:"isp";s:0:"";s:12:"organization";s:0:"";s:8:"timezone";s:13:"Europe/Tirane";s:5:"extra";s:0:"";s:9:"connector";O:16:"Joomla\Http\Http":2:{s:10:"__NULL_BYTE__*__NULL_BYTE__options";a:0:{}s:12:"__NULL_BYTE__*__NULL_BYTE__transport";O:26:"Joomla\Http\Transport\Curl":1:{s:10:"__NULL_BYTE__*__NULL_BYTE__options";a:0:{}}}}" at app/bundles/CoreBundle/Doctrine/Type/ArrayType.php line 48

It was because the old IP address code used Reflection to get the properties but $connector was not defined and thus considered public. No idea why this is not more widespread.

Steps to reproduce the bug:

1. No idea :-)

[alanhartless]

This has been reviewed by our team and in production for months now so marking as pending test confirmation.