default void postCompletedSnapshotAction(ObserverContext<MasterCoprocessorEnvironment> ctx,
    SnapshotDescription snapshot, TableDescriptor tableDescriptor) throws IOException {
  }
Called after the snapshot operation has been completed.
@param ctx             the environment to interact with the framework and master
@param snapshot        the SnapshotDescriptor for the snapshot
@param tableDescriptor the TableDescriptor of the table to snapshot
hbase-server/src/main/java/org/apache/hadoop/hbase/coprocessor/MasterObserver.java