CP-5923: Add the test input as an argument to extract_output

Signed-off-by: John Else <john.else@citrix.com>
CP-5923: Add a couple of basic tests of get_remaining_capacity

Signed-off-by: John Else <john.else@citrix.com>
Merge pull request #1440 from johnelse/vgpu-unit-tests

First attempt at some vgpu unit tests