BUG 2049 DataStore failure in StatisticsManager
BUG 2101 When L2 switch installed, its flows are interpreted as new flows with each stats request
* hashCode is not safe in general so we'd like to prevent Collisions how we can
* we change HashBuilding to KeyBuilding from toString method
* toString is generated in CompileTime
* it can not be change during JVM run
* every one use same YANG model version and jar files
* and the same aproach could by use across claster
* add cleaning disconnected Node from StatListeningCommiter implementers
Change-Id: I645e9f07382af0b293bc43698446b7b84b95bbde
Signed-off-by: Vaclav Demcak <vdemcak@cisco.com>