While trying to use LossyCounting for HBASE-15519 , found following bugs in current implementation
– Remove synchronization block from MetaTableMetrics to avoid congestion at the code
– Fix license format
– Fix LossyCounting algorithm as per http://www.vldb.org/conf/2002/S10P03.pdf
– Avoid doing sweep on every insert in LossyCounting
– Remove extra redundant data structures from MetaTableMetrics.