Reduce log count

[squirrelsc]

Those line will create a lot of lines in log, but it's worth to capture the errors in Python patterns. So please update the logic, copy_back the files, and then check them. It will reduce log, and the downloaded files can be used for troubleshooting.

lisa/microsoft/testsuites/core/azure_image_standard.py

Line 247 in 035f1af

grub_output = node.tools[Cat].read("/boot/grub2/grub.cfg", sudo=True)

lisa/microsoft/testsuites/core/azure_image_standard.py

Line 754 in 035f1af

log_output += cat.read("/var/log/syslog", force_run=True, sudo=True)