smac2 + bug fixes

V 1.1

• Allow the possibility to run the simulation normally or control errors using the file system
• Fix some debug output messages
• Fix merge output in non-deterministic modality

smac2 and hyvar demo 1 example

This is the version used to collect the data presented in the following paper:
Jia-Chun Lin, Jacopo Mauro, Thomas Brox Røst and Ingrid Chieh Yu. A Model-Based Scalability Optimization Methodology for Cloud Applications. IEEE SC2 2017