Fix slide.erl unit tests. The new implementation of slide cannot use only the moment "time" to make decisions of which 1-second files to consider: time must actually go by in 1 second increments (to allow file mtimes to change). So, to simulate the passage of time for EUnit tests, I added the idle_time_passing/3 function. A side-effect of this is adding extra event counts, one per simulated second, so some of the expected counts from the pre-commit tests needed to be increased. Also, the quantile calculations by basho_stats_histogram.erl are clever estimates, but the ranges of 1-100 needed to be increased by a factor of 100 to be able to fall into different histogram summary bins.