Temporary fix to script hang

Pipeline suddenly started hanging after regress script finishes (until
tee process is killed).

Something in regress scripts must be creating a background process or
other sub-process that is not properly closing file descriptors,
causing pipeline to hang waiting for input.

For now we'll do without the real-time summary in the console log file.

Change-Id: Ic07ba1b4ee63e27ab8dfea3b3077858ace475a47