Stop the publisher after use in the individual tests

Signed-off-by: Adam.Dybbroe <a000680@c21856.ad.smhi.se>

activefires_pp/tests/test_messaging.py

@@ -78,6 +78,7 @@ def test_check_incoming_message_nc_file_exists(setup_comm,
     with patched_publisher() as published_messages:
         result = afpp.check_incoming_message_and_get_filename(input_msg)
 
+    afpp.publisher.stop()
     assert result is None
     assert len(published_messages) == 2
     assert 'No fire detections for this granule' in published_messages[0]
@@ -113,6 +114,7 @@ def test_check_incoming_message_txt_file_exists(setup_comm,
     with patched_publisher() as published_messages:
         result = afpp.check_incoming_message_and_get_filename(input_msg)
 
+    afpp.publisher.stop()
     assert len(published_messages) == 0
     assert result == '/san1/polar_out/direct_readout/viirs_active_fires/unfiltered/AFIMG_npp_d20230705_t1007509_e1009151_b60553_c20230705102721942345_cspp_dev.txt'  # noqa
 
@@ -144,6 +146,7 @@ def test_check_incoming_message_txt_file_does_not_exist(setup_comm,
     with patched_publisher() as published_messages:
         result = afpp.check_incoming_message_and_get_filename(input_msg)
 
+    afpp.publisher.stop()
     assert len(published_messages) == 0
     assert result is None