API Function to check for queryname or query group sorts

[nh13]

In a lot of places we check if the input SAM header is queryname or query group sorted. We should have a single function in Bams to do this.

I think we should also have a function that can be used on an iterator of SAM records that checks for either queryname or query group sorts, and emits a warning (or fails) when proven wrong. It would return an iterator of sam records so it can be used in a map over the iterator.

We could then use the above methods in our consensus tools to warn when the user really should provide a sorted SAM in the right order, or just check ourselves.