Removes an incorrect and unnecessary return

The current return statement creates a new object that is
not used anywhere and does not provide a functionality

Change-Id: Id53f6fbc8cc6fb38419e5616a352279f1a9b917f
Closes-Bug: #1276367
Add additional unit tests for the ML2 plugin

This commit adds extended unit test coverage for the ML2 plugin.py file.

Partial-Bug: 1236127

Change-Id: I2f4465c84810965679a585007cd9005ba8a7da71
Merge "Add additional unit tests for the ML2 plugin"
Merge "Removes an incorrect and unnecessary return"