fix cursor timeout logging #826
adjusted cursor_timeout.js numbers to account for 4s idle timer period #826

The thread that checks for idleness wakes up every 4s and adds 4000ms to the idle age
no matter how recent the latest getMore was, so we need to make the numbers in this
test a little bigger.
Merge branch 'bugfixes/tokumx-1.3' into releases/tokumx-1.3