Remove flood debug trace on xml generation error

The patch 0b3ff88 "Add log in case of failure" added
the log of all system process and network.
It was planed to be used to debug a tricky socket
error bug.
This was fixed since and the traces now only
food build log and makes route causing generation
error a lot harder.

Remove extra debug message (netstat and ps invocation)
on error.

Signed-off-by: Kevin Rocard <kevinx.rocard@intel.com>