A bunch of small changes. Now calls swapexp in wait mode. Each reswap
also stores previous mapping info in the lock file for debugging/data collection. max_retries for reswap is also set high so we pretty much go until some vnode gets mapped one-to-one and if that does not track real-time, the experiment fails. There are also a couple of sleep statements with times determined empirically so there is a chance for as many pnodes to report ``violation'' as possible. All these changes are for the ''doubling vnode weights'' method of sim auto-adaptation.