Replace unsafe `eval()` with `getattr()` in pod_network_outage_plugin.

[shiavm006]

A potential code execution vulnerability exists in pod_network_outage_plugin.py where eval() is used to dynamically access object attributes. This pattern can be exploited if the direction parameter contains malicious input.

A malicious scenario configuration file could potentially include crafted values in the direction field that, when processed by eval(), could execute arbitrary Python code.