FIX: new systems expect encoded body

Summary

So far the MockupResponse always returned a str. On new systems however it is expected that the return value is bytes. When debug=1 is enabled for the Container on a new OS, the MockupResponse return value thus results in an error.

Focus

See for example _log_response in model.py.

I also changed unittests accordingly.

Note

What is the python version corresponding to 0x03000000? Can we drop this condition entirely?

Test Environment

Run advancedtools unittests with debug=1.

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.gitlab-ci.yml

@@ -72,8 +72,9 @@ trigger_build:
     # Renaming variables.
     F_BRANCH: $CI_COMMIT_REF_NAME
     PYLIB: $CI_COMMIT_REF_NAME
-    TriggeredBy: PYLIB
-    TriggeredByHash: $CI_COMMIT_SHORT_SHA
+    TRIGGERED_BY_REPO: PYLIB
+    TRIGGERED_BY_REF: $CI_COMMIT_REF_NAME
+    TRIGGERED_BY_HASH: $CI_COMMIT_SHORT_SHA
 
   trigger:
     project: caosdb/src/caosdb-deploy