Adding a regression test suite for lazy evaluation

results/21-jan/Conqueue.out

results/21-jan/Esop.out

results/21-jan/MsortBU.out

results/21-jan/Num.out

results/21-jan/NumRep.out

results/21-jan/RDQ.out

results/21-jan/RTQ.out

results/21-jan/Sort.out

src/main/scala/leon/GlobalOptions.scala

...in/scala/leon/invariant/engine/InferInvariantsPhase.scala

...ala/leon/invariant/templateSolvers/NLTemplateSolver.scala

src/main/scala/leon/laziness/LazinessEliminationPhase.scala

src/main/scala/leon/laziness/LazyVerificationPhase.scala

...ources/regression/orb/lazy/withconst/SortingnConcat.scala

...es/regression/orb/lazy/withconst/WeightedScheduling.scala

src/test/resources/regression/orb/lazy/withorb/Concat.scala

...esources/regression/orb/lazy/withorb/SortingnConcat.scala

...rces/regression/orb/lazy/withorb/WeightedScheduling.scala

...t/scala/leon/regression/orb/LazyEvalRegressionSuite.scala

src/test/scala/leon/regression/orb/OrbRegressionSuite.scala