Changed set operator names

changed:
IntersectOperator to Intersect_Ordered
ExceptOperator to Except_Ordered
Intersect_Ordered to IntersectAll_Ordered
SetPlanNode summaryString method changed

Method changed to allow for different operators to be seen when running
RuleTest,
small change had to be made in ASTStatementLoader to pass in properly
formatted name
RulesTest added for Except and Intersect

Tests added
 except-2 test fixed to reflect change of Intersect_Ordered to
IntersectAll_Ordered