revert: keep run-tests.sh with per-file pytest invocations

Revert to the original per-file invocation style — it allows running
tests selectively by commenting out individual lines.

Part-of: <http://gitlab.vnc.biz/uxf/vnctalk-prosody/-/merge_requests/3>

run-tests.sh

@@ -1,13 +1,5 @@
 #!/bin/bash
 #
-# Run the testsuite against an external (non-compose) Prosody deployment.
-#
-# Unlike run-compose-tests.sh (which brings up its own stack), this script
-# points at an already-running server. Tests that need compose-specific
-# infrastructure (docker exec, MOCK_URL, low smacks_hibernation_time) will
-# skip automatically.
-#
-set -euo pipefail
 
 export XMPP_HOST=xmpp.microlab.zimbra-vnc.de
 export XMPP_PORT=30522 
@@ -30,4 +22,18 @@ export PG_DB=prosody
 export PG_USER=prosody
 export PG_PASSWORD=eS5Gi7ahzo3chaiXiel0ief
 
-pytest tests/ -v -c tests/pytest.ini
+pytest tests/test_01_core.py -v -c tests/pytest.ini
+pytest tests/test_02_muc.py -v -c tests/pytest.ini
+pytest tests/test_03_vnctalk.py -v -c tests/pytest.ini
+pytest tests/test_04_infra.py -v -c tests/pytest.ini
+pytest tests/test_05_patches.py -v -c tests/pytest.ini
+pytest tests/test_06_postgres.py -v -c tests/pytest.ini
+pytest tests/test_07_module_load.py -v -c tests/pytest.ini
+pytest tests/test_08_image_patches.py -v -c tests/pytest.ini
+pytest tests/test_09_http_sideeffects.py -v -c tests/pytest.ini
+pytest tests/test_10_smacks.py -v -c tests/pytest.ini
+pytest tests/test_11_smokes.py -v -c tests/pytest.ini
+pytest tests/test_12_image_runtime.py -v -c tests/pytest.ini
+
+# Or run the whole suite at once:
+# pytest tests/ -v -c tests/pytest.ini