Eng 7326 plannode reorder

This pull requests is basically reordering the Projection node and ORDER BY node for step 1. Step 2 will make the Aggregation node and Projection node inline for certain cases.

For some cases we can not reorder the plan node tree for ORDER BY, I regressed it to use the old plans although they are not efficient.
This was already a bit of a mess, but ...
Sometimes the "By" at the end of a name like ...OrderBy or ...GroupBy is "By" and sometimes it is "by". 
Consistency ( always "By" ) would be nice.