Explicitly list python3-h5py in debian/tests/control.in to ensure that we have...

Explicitly list python3-h5py in debian/tests/control.in to ensure that we have this module installed during an autopkgtest run to generate the test fixure.

debian/tests/control.in

@@ -4,10 +4,10 @@
 #   $ mv debian/tests/control.tmp debian/tests/control
 
 Tests: pytest-with-recommends
-Depends: python3-all, diffoscope, black, python3-pytest, file, linux-image-amd64 [amd64] | linux-image-generic [amd64], %RECOMMENDS%, %PYRECOMMENDS%
+Depends: python3-all, diffoscope, black, python3-pytest, python3-h5py, file, linux-image-amd64 [amd64] | linux-image-generic [amd64], %RECOMMENDS%, %PYRECOMMENDS%
 
 Tests: pytest
-Depends: python3-all, diffoscope, python3-pytest, file, python3-tlsh
+Depends: python3-all, diffoscope, python3-pytest, python3-h5py, file, python3-tlsh
 
 Tests: basic-command-line
 Depends: diffoscope

tests/comparators/test_hdf.py

@@ -39,6 +39,7 @@ def hdf5_fixture(prefix):
     def hdf5d(tmpdir):
         filename = str(tmpdir.join('{}.db'.format(prefix)))
 
+        # Listed in debian/tests/control.in
         import h5py
 
         with h5py.File(filename, 'w'):