Merge pull request #2093 from boggle/2.1-resolve-tokens

2.1 Introduce token ids into the ast and resolve them for Ronja
Revert "Merge pull request #2093 from boggle/2.1-resolve-tokens"

This reverts commit ff59de12fb37442e10ea75d9e9b411aa8504a702, reversing
changes made to 27a8c40fb80aefefbe169c03216cd2c9151f9278.
Introduce Selections to the QueryGraph and SQGBuilder

o SQGB: For now only works with HasLabels() in MATCH
o Renamed ProjectionPipe to ProjectionNewPipe
o QueryGraph: Projections are now a Map[String, Expression]
Prototype simple label scan support for new planner

o The missing piece is label id resolution