Now deterministic eval by default check if the model is ground, else evaluate it.

src/main/scala/leon/evaluators/Evaluator.scala

src/main/scala/leon/repair/rules/Focus.scala

src/main/scala/leon/synthesis/ExamplesBank.scala

src/main/scala/leon/synthesis/ExamplesFinder.scala

src/main/scala/leon/synthesis/rules/CEGISLike.scala

src/main/scala/leon/synthesis/rules/IntroduceRecCalls.scala