Fix 991

[GigleGig]

Test inclusion requirements

No new tests were added; this patch simply hardens the existing Junos cleaners. Verified with:
CONDA_NO_PLUGINS=true conda run -n suzieq pytest tests/unit/poller/worker/services/test_service.py

Related Issue

Fixes #991

Description

SRX5600 devices (detected as junos-es) return multi-routing-engine JSON and sometimes emit lists/None in interface and ARP data. The poller expected MX-style JSON and scalar fields, so it raised KeyError, AttributeError, and TypeError while cleaning. This change reuses the QFX normalizer for junos-es, normalises interface type values, and guards ARP entries without oif, allowing SRX firewalls to be parsed successfully.

Type of change

• Bug fix (non-breaking change which fixes an issue)

New Behavior

• junos-es devices pull the QFX command/normalisation set, matching SRX multi-RE uptime output.
• Junos interface cleaner now flattens list/dict type fields before lowercasing.
• Junos ARP/ND cleaner tolerates missing oif values, defaulting to an empty string.

Contrast to Current Behavior

• Previously, SRX polling crashed on bootup timestamp extraction, interface type cleaning, and ARP entries with missing oif.

Discussion: Benefits and Drawbacks

• Benefits: Enables SRX/junos-es polling without errors; retains existing behaviour for other Junos platforms.
• Drawbacks: None identified; changes are backward-compatible.

Changes to the Documentation

• None required.

Proposed Release Note Entry

• Fix SRX (junos-es) poller crashes by aligning JSON normalisation and handling missing interface/ARP fields.

Comments

• Tests executed: CONDA_NO_PLUGINS=true conda run -n suzieq pytest tests/unit/poller/worker/services/test_service.py

Double Check

• I have read the comments and followed the CONTRIBUTING.md.
• I have explained my PR according to the information in the comments or in a linked issue.
• My PR source branch is created from the develop branch.
• My PR targets the develop branch.
• All my commits have --signoff applied