Fix for inventory host processing

[p3ck]

SUMMARY

This change provides sane defaults when NIC's are still in process of coming up.

Fixes #1544

ISSUE TYPE

• Bugfix Pull Request

COMPONENT NAME

plugins/inventory/azure_rm.py

ADDITIONAL INFORMATION

See the issue for the traceback that this fixes

I've had the customer that experienced this traceback use this patch and it fixes the issue.

[Fred-sun]

ready_for_review!