- needsJoinDirective() logic is incorrect. We need to make sure that we add a join field when @fromDirective exists on the arguments, not the definition
- Query plans were incorrect if type was entirely in one subgraph. selectionIsFullyLocalFromAllVertices was calling SelectionSet.canRebaseOn so we fixed to return false if the selection contained a field with a contextual argument
- For top level queries, we don't want to have "... on Query" in the rewrite path.
- Fixed up  selectionSetAsKeyRenamers() logic