Update experiment scripts

[harrygav]

Currently we have two methods for executing experiments in the client module. The bash script run_experiments.sh is designed to to work locally, while the experiment_scheduler is a python project for running concurrently experiments on the cluster. We should consolidate them and only have one script, the experiment_scheduler. For that we need to do following steps:

• Add functionality to the experiment_scheduler to run locally
• Update the configuration.py to include the hosts from the hostsfile.txt
• Allow the experiment_scheduler to run locally if it detects localhost (or similar) in the hostsfile