GEOMESA-120 Extract Temporal Filters

* We now extract the temporal range to cover from the applicable temporal filters.
* Since FilterToAccumulo is no longer used, it has been deleted.
(This required tweaking one unit test.  Additional clean-up was involved.)
* Added 'pendingUntilFixed' unit tests to the QueryStrategyDeciderTest to reflect further work.
I accept the DSL razz, but did wonder about whether we should introduce a `RichFilter` class that could encapsulate some of the checks we are using multiple times in this (and other) sections.