tests: move vppinfra tests to src/vppinfra/test

- Refactor make test code to be co-located with
  the vpp feature source code

Type: test

Signed-off-by: Dave Wallace <[email protected]>
Change-Id: Iceaeab769c08e541b31546663d0e402ced862e5b

diff --git a/test/test_vppinfra.py b/src/vppinfra/test/test_vppinfra.py
similarity index 100%
rename from test/test_vppinfra.py
rename to src/vppinfra/test/test_vppinfra.py