A sub-operation cannot trigger a sub-sub operation

[didier-wenzek]

Describe the bug

While an operation workflow can trigger a sub-operation, this behavior is not recursive: currently a sub-operation cannot trigger a sub-operation. And this is even more confusing as the sub-sub operation is accepted by tedge_agent but is not working leading to a main operation instance that never terminate.

See this comment: #2792 (comment)

To Reproduce

See the system "Invoke sub-operation from a sub-operation" added by this PR: #2853. This test

• defines 3 operation workflows: grand_parent operation triggers a parent operation that triggers a child operation.
• and triggers a grand_parent command

Expected behavior

• The 3 commands should be launched in turn
• Starting the grand_parent operation
• Starting the parent operation, pausing the grand_parent operation
• Starting the child operation, pausing the parent operation
• Ending the child operation, resuming the parent operation
• Ending the parent operation, resuming the grand_parent operation
• Ending the grand_parent operation

Current behavior

The 3 commands are launched in turn as expected;
but the parent operation doesn't resume when the child operation ends.

Screenshots

[te/device/main///cmd/gp_command/test-sub-sub] {"status":"init", "output_file":"/tmp/test-sub-sub.json"}
[te/device/main///cmd/gp_command/test-sub-sub] {"output_file":"/tmp/test-sub-sub.json","status":"awaiting_completion"}
[te/device/main///cmd/super_command/sub:gp_command:test-sub-sub] {"status":"init"}
[te/device/main///cmd/super_command/sub:gp_command:test-sub-sub] {"status":"executing","y":"some y value"}
[te/device/main///cmd/super_command/sub:gp_command:test-sub-sub] {"status":"awaiting_completion","y":"some y value"}
[te/device/main///cmd/sub_command/sub:super_command:sub:gp_command:test-sub-sub] {"status":"init","x":"some x value","y":"some y value"}
[te/device/main///cmd/sub_command/sub:super_command:sub:gp_command:test-sub-sub] {"status":"executing","x":"some x value","y":"some y value"}
[te/device/main///cmd/sub_command/sub:super_command:sub:gp_command:test-sub-sub] {"status":"successful","x":"some x value","x_bis":"some x value","y":"some y value","y_bis":"some y value"}

Environment (please complete the following information):

• OS [incl. version]
• Hardware [incl. revision]
• System-Architecture [e.g. result of "uname -a"]
• thin-edge.io version [e.g. 0.1.0]

Additional context

[gligorisaev]

QA has thoroughly checked the bug and here are the results:

• Test for ticket exists in the test suite.
• tests/RobotFramework/tests/tedge_agent/workflows/custom_operation.robot
• Review of Test added in the PR #2853
• QA has tested the bug and it's not reproducable anymore