Explicitly mention numbering type in output and/or switch to logical numbering

[GuillaumeMercier]

In current tests, the internal function qvi_test_emit_task_bind uses
hwloc_bitmap_asprintf and hwloc_bitmap_list_asprintf to output binding information.
However, since they take as input parameter a cpuset and as the hwloc documentation
states : Both CPU and node sets are always indexed by OS physical number.

Therefore, physical numbers for PUs are displayed which can be confusing and/or ambiguous.

Possible fixes:

• switch to logical numbering
• explicitly output the nature of the numbering used