Revert "MB-7515: redirect running msg to stdout"

This reverts commit 09bb677891720b25b258d29acd964bd9b2df12a3.
STDOUT is reserved for data, such as when exporting to CSV format.

Change-Id: Ief0ce3ead5d8fdeec54540b3a43dd5dc40c571b5
Reviewed-on: http://review.couchbase.org/23995
Reviewed-by: Steve Yen <steve.yen@gmail.com>
Tested-by: Bin Cui <bin.cui@gmail.com>