ENH: Reduce the output of TestSetGet.tcl

TestSetGet.tcl produces over 6 meg of output. This patch reduces that
to 50k. This should speed up the test and may stop timeouts on some
Mac systems.

Change-Id: I102f85bb8bcd4985e1d7ee2c66361da4ddaeb242
Merge topic 'TestSetGet_ReduceOutput' into master

d09b4fa7 ENH: Reduce the output of TestSetGet.tcl