Bug 34029: Extend datatypes of biblioitems.columns to text to avoid breaking import

Bug 34029: Extend datatypes of biblioitems.columns to text to avoid breaking import

This updated the datatype of the following columns from varchar(255) to text
to avoid import problems if the mapped MARC field's data exceeds 255
characters.

This is for:
* place (260$a and 264$a)
* publishercode (260$b and 264$b)
* size (300$c)
* illus (300$b)
* pages (300$a)

To test:
* Edit a bibliographic record and enter more than 255 characters into
  the MARC fields listed above. Try to save.
* Run the updatedatabase script to modify the DB structure
* restart_all
* Edit a bibliographic record and enter more than 255 characters into
  the MARC fields listed above.
* Save
* Export the record
* Import the record using staging tools, all should work well

Signed-off-by: Sam Lau <samalau@gmail.com>
Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>