GMU: bugfix: wrong synchronization can allow two or more transactions to commit at the same time (violating the order in CommitLog)
 * Speculative commit with one more stat.
 * Verbosity still to be reduced
 * Fixing NPE in RpcManagerWrapper
 * Trying to fix lockHoldTimes
 * Trying to refactor something
 * Trying to have remoteHoldTime also in Isolation!=Serializable
 * Fixing remoteHoldTime
 * Improving initalization of some static variables
 * Now taking the time it takes to collect the stats upon terminating a transaction (just for debug)
 * TERMINATION_COST is not working yet
 * Changed some stats
 * Some stats are now Double
 * New remote gets- related statistics