PostgresQueueTest#testList: Tolerate up to 1s skew in queued time stamp

On OSX the test is failing with:

  Not true that <2019-02-27 14:09:57.617928> is at most <2019-02-27 14:09:57.6>

Add a tolerance of up to 1 second.

Change-Id: I2b126032d98d532e71c76ac75a1958e84988fe8b
1 file changed