Improve execution handling

This merge request enforces the use of the current user for the execution of the docker container where nothing specific was written in the configuration.

This also allows to make the container itself read-only.

Part of #94

changed milestone to %Soft loops

added enhancement label

added 4 commits

• fdc9f5bd...dc387a4b - 2 commits from branch master
• d80928ac - [execution][docker] If nothing configured use the current user id
• 3cd7905b - [dock] Make the container read-only

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Note: just did a rebase of the codebase

changed title from improve execution hanlding to improve execution handling

changed the description

changed title from improve execution handling to Improve execution handling

added 3 commits

• 7aa7fea6 - [execution][docker] If nothing configured use the current user id
• 27371fc7 - [dock] Make the container read-only
• 050b1e39 - [test][docker_execution] Add test for mismatch between user and configured user

Compare with previous version

resolved all threads

merged

mentioned in commit 586b35f3