Fix returnAuthorizeVPN

[dcec]

Can't locate object method "returnAuthorizeVPN" via package "pf::Switch::Fortinet::FortiGate"

Description

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Describe what the new code is used for.
ie: Allow PacketFence to trigger the coffee machine on wireless EAP 802.1X connection to brew a fresh espresso.

Impacts

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Describe what to reviewer should look at. Will also help for testing purposes.
ie: - RADIUS authorize workflow

Code / PR Dependencies

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NEW Package(s) required

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Which new package(s) (all supported distributions) are required for this PR to work.

Issue

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The following syntax 'fixes #ISSUE_NUMBER' will automatically closes a Github issue on pull-request merge time.
Modify the ISSUE_NUMBER in order to reflect the Github issue that need to be closed
fixes #ISSUE_NUMBER

Delete branch after merge

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YES | NO

Checklist

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• Document the feature
• Add unit tests
• Add acceptance tests (TestLink)

NEWS file entries

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New Features

• Feature 1
• Feature 2

Enhancements

• Enhancement 1
• Enhancement 2

Bug Fixes

If an issue exists on Github, please refer to it (name) along with it's number...

• Issue with Zammitbug in sandwich context (Feature/report sponsor #42)
• Issue with Zammitbug in dinde context (fix for #1493 pfcmd vlan deauth exit code fix #43)

UPGRADE file entries

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