Test: SHORT_TIMESCALE = 50.

This is probably cutting things a little close, but I haven't seen it
fail yet, and really we ought to be attempting some pretty short
timescales to make sure we have all our timeouts tuned correctly anyway.
It also happens to make the tests run faster.

Author: prdoyle

bosk-mongo/src/test/java/works/bosk/drivers/mongo/internal/TestParameters.java

@@ -17,7 +17,7 @@ public class TestParameters {
 	 * Too short, and the tests might not be testing the right thing.
 	 * This should be much larger than the expected latency of MongoDB and the network.
 	 */
-	public static final int SHORT_TIMESCALE = 100;
+	public static final int SHORT_TIMESCALE = 50;
 
 	/**
 	 * For tests that are not expecting timeouts. A nice long value makes spurious test failures unlikely.