🐛 Longitudinal pipeline: 'Configuration' object has no attribute 'subject_id'

[shnizzedy]

Describe the bug

	 Connecting brain_extraction_T2...
Traceback (most recent call last):
  File "/code/run.py", line 833, in <module>
    raise exception
  File "/code/run.py", line 827, in <module>
    run_main()
  File "/code/run.py", line 796, in run_main
    exitcode = CPAC.pipeline.cpac_runner.run(
  File "/code/CPAC/pipeline/cpac_runner.py", line 425, in run
    run_T1w_longitudinal(sublist, c)
  File "/code/CPAC/pipeline/cpac_runner.py", line 209, in run_T1w_longitudinal
    anat_longitudinal_wf(subject_id, sub_list, cfg)
  File "/code/CPAC/longitudinal_pipeline/longitudinal_workflow.py", line 467, in anat_longitudinal_wf
    rpool.gather_pipes(workflow, config)
  File "/code/CPAC/pipeline/engine.py", line 957, in gather_pipes
    outputs_logger = getLogger(f'{cfg["subject_id"]}_expectedOutputs')
  File "/code/CPAC/utils/configuration/configuration.py", line 197, in __getitem__
    return getattr(self, key)
AttributeError: 'Configuration' object has no attribute 'subject_id'

Expected behavior

• longitudinal pipeline isn't impossible to launch

Acceptance criteria

• longitudinal pipeline launches successfully

C-PAC version

1.8.7.dev

Additional context

Reported by @Shinwon Park on Slack