MCOL-642 Separate TEXT from BLOB

* TEXT and BLOB now have separate identifiers internally
* TEXT columns are identified as such in system catalog
* cpimport only requires hex input for BLOB, not TEXT

dbcon/mysql/dumpcat_mysql.sql

@@ -18,6 +18,7 @@ select
 	              when 12 then 'VARCHAR'
 	              when 13 then 'CLOB'
 	              when 14 then 'BLOB'
+	              when 15 then 'TEXT'
 	              end DATATYPE, 
 	SCALE, PREC, COLUMNLENGTH COLLEN, COLUMNPOSITION POS, COMPRESSIONTYPE CT
 from