Explain plan to output local index name if it is used

When we create local index on the table, we use different column family to store the index data. When we use Explain plan for any query that uses local index, since the hbase table name remains same for the local index, we only output that table name. To provide more clarity, we should output local index name in the Explain plan output if the local index is to be used.

When local index is used, we should output in the format "${local_index}(${physical_table_name})" instead of "${physical_table_name}".