GEOMESA-311,312 Handle spatial-temporal and attribute filters and querie...

...s containing multiple attribute filters

Geo & attr gets a StIdxStrategy; attr & geo uses an AttrIdxStrategy. Added
additional filters to test this behavior.
If multiple attribute filters are indexable, use the first one as index and apply the rest as a filter
In the future, a query optimizer will make more informed strategy decision
All of these subclasses require that the appropriate subclass has been decided on and all have assumptions like this or they throw errors.