Failure to retrieve credentials through Automatic Credentials Discovery

[sgouache]

Description

When installed with pip + deb, khiops v11 fails to retrieve the Google credentials properly via Automatic Credentials Discovery
Credentials were configured properly via
gcloud auth application-default login

Questions/Ideas

When accessing data on GCS with a python khiops script, apparently the environment seems to be modified, causing khiops GCS driver to revert to default credentials (if any).
Khiops binary retrieves credentials properly in the same situation
Note: Khiops v10 did this perfectly OK

Context

• Khiops v11 when used via python

[popescu-v]

The problem stems from the runner breaking the HOME variable in the Khiops executable subprocess environment on Linux: HOME is set to a path concatenation between the value of KHIOPS_MPI_HOME and HOME in any case.

The fix consists in setting HOME to the value of KHIOPS_MPI_HOME directly, only if HOME is not already defined in the environment.