tests: move bihash 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: I0133a00def595fe1c08ab881633ef9f89148a286

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