Live tests for the Python and asyncio docs code samples - #241

Issues
======
- Added 12
           

Complexity increasing per file
==============================
- docs-snippets/asyncio/access_manager.py  16
- docs-snippets/asyncio/access_manager_v2.py  43
- docs-snippets/asyncio/channel_groups.py  12
- docs-snippets/asyncio/configuration.py  22
- docs-snippets/asyncio/file_sharing.py  42
- docs-snippets/asyncio/message_actions.py  23
- docs-snippets/asyncio/message_persistence.py  65
- docs-snippets/asyncio/misc.py  4
- docs-snippets/asyncio/mobile_push.py  25
- docs-snippets/asyncio/presence.py  55
- docs-snippets/asyncio/publish.py  15
- docs-snippets/asyncio/subscribe.py  135
- docs-snippets/asyncio/zz_application_level.py  6
- docs-snippets/conftest.py  43
- docs-snippets/harness/assertions.py  17
- docs-snippets/harness/audit.py  57
- docs-snippets/harness/cli.py  35
- docs-snippets/harness/env.py  25
- docs-snippets/harness/janitor.py  21
- docs-snippets/harness/lint_markers.py  31
- docs-snippets/harness/listeners.py  14
- docs-snippets/harness/manifest.py  18
- docs-snippets/harness/markers.py  24
- docs-snippets/harness/names.py  10
- docs-snippets/harness/preflight.py  24
- docs-snippets/harness/recorder.py  9
- docs-snippets/harness/redact.py  11
- docs-snippets/harness/registry.py  13
- docs-snippets/harness/reporter.py  20
- docs-snippets/harness/stage.py  17
- docs-snippets/harness/step.py  26
- docs-snippets/harness/wait.py  9
- docs-snippets/harness/world.py  30
- docs-snippets/selftest/test_harness.py  20
- docs-snippets/sync/access_manager.py  17
- docs-snippets/sync/access_manager_v2.py  41
- docs-snippets/sync/channel_groups.py  11
- docs-snippets/sync/configuration.py  18
- docs-snippets/sync/encryption.py  15
- docs-snippets/sync/file_sharing.py  38
- docs-snippets/sync/message_actions.py  22
- docs-snippets/sync/message_persistence.py  60
- docs-snippets/sync/misc.py  8
- docs-snippets/sync/mobile_push.py  22
- docs-snippets/sync/objects.py  62
- docs-snippets/sync/objects_membership.py  67
- docs-snippets/sync/presence.py  65
- docs-snippets/sync/publish.py  19
- docs-snippets/sync/subscribe.py  133
- docs-snippets/sync/zz_application_level.py  5
         

Clones added
============
- docs-snippets/asyncio/access_manager.py  23
- docs-snippets/asyncio/access_manager_v2.py  9
- docs-snippets/asyncio/channel_groups.py  3
- docs-snippets/asyncio/configuration.py  1
- docs-snippets/asyncio/message_actions.py  4
- docs-snippets/asyncio/message_persistence.py  12
- docs-snippets/asyncio/misc.py  2
- docs-snippets/asyncio/mobile_push.py  2
- docs-snippets/asyncio/presence.py  3
- docs-snippets/asyncio/publish.py  3
- docs-snippets/asyncio/subscribe.py  35
- docs-snippets/harness/listeners.py  2
- docs-snippets/sync/access_manager.py  23
- docs-snippets/sync/access_manager_v2.py  9
- docs-snippets/sync/channel_groups.py  3
- docs-snippets/sync/configuration.py  1
- docs-snippets/sync/message_actions.py  4
- docs-snippets/sync/message_persistence.py  10
- docs-snippets/sync/misc.py  2
- docs-snippets/sync/mobile_push.py  2
- docs-snippets/sync/objects.py  7
- docs-snippets/sync/objects_membership.py  11
- docs-snippets/sync/presence.py  5
- docs-snippets/sync/publish.py  3
- docs-snippets/sync/subscribe.py  33