@Override
   public void dropStagingTable () throws SQLException {
      this.getConnection();
      LOG.info("Dropping staging collection: {}", getQualifiedStagingTableName());
      sinkDatabase.getCollection(getQualifiedStagingTableName()).drop();
      this.close();
   }
Constructs the SqlManager.

@param opts the ReplicaDB ToolOptions describing the user's requested action.
src/main/java/org/replicadb/manager/MongoDBManager.java