Updates logging behaviour. logging.properties is now the definitive config if it can be found. Internal defaults are only applied if logging.properties isn't available.
http://bugzilla.eng.vmware.com/show_bug.cgi?id=1065991
Internal logging default now use the same formatter object.
Minor updates to BootstrapMain so that we can specify a config directory instead of just a config file. This is then used when we call readPropertyFile.
Logging updates to note where properties are loaded from and any overlays that are in place.
Corresponding updates to ModelController.