Ensure all regions are loaded into spatial index + misc validation fixes

* Currently only the first 1000 rows from a georegion dataset are loaded into the spatial index. Specifying an explicit limit of long.max so we don't cut off large georegion datasets.
* Allow through reprojected lons/lats that are basically valid
* New param to bypass feature validation
'Tis already commented out in QC reference.conf :)
https://github.com/socrata/query-coordinator/blob/master/src/main/resources/reference.conf