Various changes done to upgrade metadata from v23 to v30.

-- initialize trafodion, upgrade;  will upgrade metadata from v23 to v30.
-- Following columns were added/dropped/modified in metadata tables:
  -- COLUMNS: added sql_data_type
  -- OBJECTS: added DROPPABLE column to indicated droppable table.
                     added schema_owner column.
  -- TABLES: added num_salt_partns, table_format, comment, key_length,
                  row_data_length, row_total_length.
                  Removed hbase_create_options and moved it to TEXT.
  -- SEQ_GEN: redef_ts and upd_ts added.
  -- TEXT: text_type, sub_id added.
  -- TABLE_CONSTRAINTS: added IS_ENFORCED, DROPPABLE, DISABLED,
                                        VALIDATED, LAST_VALIDATED_TIME
-- reserved flags column added to metadata tables, initialize to zero.
-- default_value in COLUMNS is now UTF8 instead of UCS2
-- new columns populated during upgrade for existing objects.
-- values that moved from one metadata table to another populated during upgrade.
-- new columns populated during create operation for new objects.
-- step added to drop/create metadata views as part of upgrade

Change-Id: I173c33cbe7ee9314c66b84d16a6ef8b2d7394335