_sandboxreapi.py: Improve batch command logging
This adds a timed activity message to bring batch command logging for REAPI-based sandboxes in line with the default sandbox as far as possible.
Thix fixes 4 xfails with buildbox-run.
This adds a timed activity message to bring batch command logging for REAPI-based sandboxes in line with the default sandbox as far as possible.
Thix fixes 4 xfails with buildbox-run.