[BUG] Dupe "Processor" entries in /etc/veba-release

[lamw]

Describe the bug
Due to multiple processors being supported, it looks like this code can potentially add multiple Processor entries into /etc/veba-release

# cat /etc/veba-release
Version: release-0.7.0
Commit: c9890cf
Processor: Knative
Processor: Knative

To Reproduce
Deploy VEBA appliance with Webhook and/or Horizon

Expected behavior
Single Processor entry should exists

Screenshots
If applicable, add screenshots to help explain your problem.

Version (please complete the following information):

• VEBA Form Factor: Appliance
• VEBA Version: release-v0.7.0

Additional context

Potential fix:

grep -q "Processor" /etc/veba-release || echo "...."