Bug 10215: Increase the size of opacnote and librariannote for table subscriptionhistory

Bug 10215: Increase the size of opacnote and librariannote for table subscriptionhistory

We have librarians that are regularly hitting the maximum number of
characters for the note fields in subscription history. They would like
to be able to store at least 1000 characters here. Converting the
varchar(150) to text should do it.

Test Plan:
1) Apply this patch
2) Run updatedatabase.pl
3) Add public and private notes to a subscription history entry
   where each note is greater than 150 characters.
4) Save and view the notes, the notes should not be truncated.

Rescued-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Owen Leonard <oleonard@myacpl.org>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>