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.
That would be useful.  As we've continued, some silly developer (git blame will likely point mainly at me) has been straying filter related functions in half-a-dozen different places.  We should unify that, extract some more functions, and maybe cook up a Filter handling DSL;)