Undo change to travis that had no effect
tests for random number generating nextInt
change to rng, CreateSeqNodesImpl uses foldLeft so we can do chained futures that are internally tail rec but not specified with the tailrec annotation
Refactor stubbing of IScope to allow params to be passed in
Refactor NodeTreeFactorySpec
Refactored NeighboursRepositorySpec
Code re-use in test
Code re-use in test