Remove flood debug trace on xml generation error

The patch 0b3ff88 "Add log in case of failure"
added system process and network log on failure.
It was planed to be used to debug a tricky socket
error bug.
The bug was since fixed and the traces now only
flood build log, making xml generation
error root cause spotting a lot harder.

Remove extra debug message (netstat and ps invocation)
on error.

Signed-off-by: Kevin Rocard <kevinx.rocard@intel.com>