Fixes and rebase for quantifiers

src/main/scala/leon/codegen/CodeGeneration.scala

src/main/scala/leon/codegen/CompilationUnit.scala

src/main/scala/leon/codegen/runtime/ChooseEntryPoint.scala

src/main/scala/leon/evaluators/RecursiveEvaluator.scala

...main/scala/leon/solvers/combinators/PortfolioSolver.scala

...main/scala/leon/solvers/combinators/UnrollingSolver.scala

src/main/scala/leon/solvers/z3/FairZ3Solver.scala

...erification/purescala/valid/InductiveQuantification.scala

src/test/scala/leon/regression/repair/RepairSuite.scala

.../scala/leon/regression/termination/TerminationSuite.scala