Introduce test facility for executing queries using the new planner
Fix label scan of all nodes in the new planner
Renames new scan pipes and adds NodeByIdScanPipe
Add support for node by id scans to ronja
Add normalizeEqualsArgumentOrder rewriting step to avoid duplication of symmetric cases when pattern matching on Equals()
Rename rewriters in a uniform way

o lower case start
o imperative phrase
Make LogicalPlanner take the PlanContext so it can enquiry about existing indices
Add support for conjunction of predicates on the same identifier
o the planner chooses the cheapest start point
Fix MATCH n WHERE id(n) = id(n) RETURN n in the new planner
Merge pull request #2105 from boggle/2.1-start-points

Finding label and node id start points for Ronja