TEIID-2580 adding a release note
TEIID-2587 adjusting the hint placement
TEIID-2588 correcting create temp table toString
TEIID-2591 ensuring projection is always corrected for system queries
TEIID-2589 correcting the reporting of subplans
Merge branch '8.4.x' of https://github.com/teiid/teiid

Conflicts:
	engine/src/main/java/org/teiid/query/optimizer/relational/PlanToProcessConverter.java